JP5409275B2 - Supervisory control system - Google Patents

Description

  The present invention relates to a monitoring control system for controlling a plurality of control objects using a plurality of control modules connected to a network.

  A monitoring control system connected by a network is used for monitoring control of equipment and plant equipment provided in buildings such as buildings. Such a system uses a control module such as a control device that executes application software and provides various functions such as an information collection function and a control function (see Patent Document 1). In control of a control target using a control module, a plurality of control modules are interconnected via a data communication path, and various information is exchanged between these control modules. The target is monitored and controlled. Each control module becomes a node in the network.

  In such a monitoring control system using a network, Ethernet (Ethernet / IEEE802.3u: 100BASE-T: registered trademark) has been used as a communication method in order to perform higher-speed data communication between control modules. (See Patent Document 2). In the network system for monitoring and control, a ring type Ethernet is used in which each control module is provided with two ports and each control module is connected in a ring shape via a communication cable such as UTP (Unshielded Twist Pair cable). (See Patent Document 3). This ring type Ethernet has STP (Spanning Tree Protocol / IEEE 802.1D) function to avoid communication errors due to ring topology existing in the data communication path, and RSTP (Rapid Spanning Tree Protocol / IEEE 802.1w) function improved. System redundancy can be realized using a network control function such as the above.

  FIG. 11 is a configuration example of a control device in which control modules are connected by the above-described ring type Ethernet system. FIG. 12 is an example of connection between a plurality of control modules using a conventional ring-type Ethernet system. Here, six control modules N1 to N6 mounted side by side on a gantry such as a DIN rail are ring-connected by a communication cable LU, and blocking is performed at a port on the control module N3 side of the control module N4. .

  By this blocking, a tree topology having two branch paths from the route control module N1 to the control module N2 → the control module N3 and the control module N5 → the control module N4 is constructed from the original ring consisting of the ring topology. As a result, the occurrence of a data loop is avoided even in a network that physically forms a ring topology.

JP 2000-148214 A Special table 2008-544658 JP 2005-109846 A

  However, in the above-described supervisory control system, the control modules are connected to each other via a data communication path consisting of communication cables to construct a ring-type Ethernet, which complicates the hardware required for the connection between the control modules. As a result, the product cost of the entire network increases, and the burden of maintenance work increases.

  FIG. 13 is a block diagram showing a main part of the inter-control module connection circuit as described above. In the case of Ethernet, a transmission circuit and a reception circuit provided in the physical layer unit PHY of each control module N are received in a physical layer unit PHY of another control module via a communication cable LU such as UTP. The circuit and the transmission circuit are interconnected. At this time, the transmission circuit and the reception circuit are connected to a connector part via a transformer in order to obtain a certain communication quality with a predetermined communication path length, and these connector parts are connected by a communication cable LU.

  Therefore, for example, a signal output from the transmission circuit of one control module N1 is received by the reception circuit of the other control module N2 via the transformer-connector unit-communication cable LU-connector unit-transformer. For this reason, as shown in FIG. 12, many circuit elements for data communication are provided even between control modules having a very short communication path length such as being installed adjacent to the same frame. The product cost of the control module itself and the entire network increases.

  In addition, a communication cable LU is required between the control modules, and maintenance work for dealing with a connection failure between the control module and the communication cable LU or disconnection of the cable increases. Furthermore, the possibility of erroneous wiring is increased. As described above, in the connection between the control modules described above, even a plurality of control modules arranged very close to each other, such as arranged on the same mount, are complicated to connect using the communication cable LU. There is a problem such as an increase in cost, and there is a problem that the control modules are not connected in an optimum state adapted to the arrangement environment of the control modules.

  The present invention has been made to solve the above-described problems, and allows control modules to be connected via a data communication path in a state optimized according to the arrangement state of a control target. The purpose is to.

The supervisory control system according to the present invention includes at least a first control module group and a second control module group composed of a plurality of control modules connected via a data communication path, and a first control module group controlling the first control module group . 1 control target and a second control target controlled by the second control module group, and the first control module group, the first control target, the second control module group, and the second control target. In the monitoring and control system in which each is connected via a signal line, the control module includes a first adjacent control module adjacent to one of the control modules and a first connector unit that electrically connects the control module. A second adjacent control module adjacent to the other of the control modules and a second connector portion for electrically connecting the control module; The connector section includes a first communication line that connects the reception port (transmission port) of the first physical layer section of the control module to the first adjacent control module, and the first physical layer section via the capacitive element. And a second communication line that connects the transmission port (reception port) of the control module to the first adjacent control module, and the second connector portion is a reception port (transmission port) of the second physical layer portion of the control module. A third communication line for connecting the second adjacent control module to the second adjacent control module, and a fourth communication line for connecting the transmission port (reception port) of the second physical layer section to the second adjacent control module via the capacitive element. The first connector portion is connected to the second connector portion of the first adjacent control module, thereby connecting the first communication line of the control module to the fourth of the first adjacent control module. Communication line And connecting the second communication line of the control module to the third communication line of the first adjacent control module, and the first connector unit is a transmission port (reception port) of the first physical layer unit. ) Is further connected to the first adjacent control module, and the second connector unit connects the transmission port (reception port) of the second physical layer unit to the second adjacent control module. It further includes a sixth communication line, includes a first cable connector for connecting a communication cable constituting the data communication path, and is connected to the first connector portion of the control module, whereby the first of the control module And a fifth adapter that connects the first communication cable and the fifth communication line to the first cable connector with a communication line via a separate termination transformer, respectively, and another communication cable that constitutes the data communication path. A second cable connector for connecting the cable, and by connecting to the second connector portion of the control module, the third and sixth communication lines of the control module are respectively connected via separate termination transformers. And a second adapter connected to the second cable connector via the communication line, and the first adapter of the first control module group and the second adapter of the second control module group are connected by a communication cable. Has been.

Thus what has been described, according to the present invention, the optimized state in accordance with the arrangement of the control object, an excellent effect that between the control module can be connected in a data communication path is obtained.

It is a block diagram which shows the structure of the monitoring control system in embodiment of this invention. It is a block diagram which shows the structure of the network system 1 which connects between control modules. It is an example of connector arrangement of a control module and an adapter. 2 is an explanatory diagram illustrating a connection form between control modules in the network system 1. FIG. It is explanatory drawing which shows the connection form of the control module and adapter in the network system. It is explanatory drawing which shows the other connection form of the control module and adapter in the network system. It is a block diagram which shows the example of a connection between control module groups using a communication cable. It is a block diagram which shows the structural example of the network system based on the connection example of FIG. It is explanatory drawing which shows the connection form of a connector and a communication line. It is explanatory drawing which shows the other connection form of a connector and a communication line. It is a structural example of the conventional ring type Ethernet system. It is a connection example of a conventional ring-type Ethernet system. It is a block diagram which shows the principal part of the conventional inter-module connection circuit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing the configuration of the monitoring control system in the embodiment of the present invention. This system includes a control device A (first control module group) 101 and a control device B (second control module group) 121. The control device A101 includes control modules 102a, 102b, 102c, and 102d, and controls the control target A105 that is connected via the signal wiring 104. Similarly, the control device B121 includes control modules 122a, 122b, 122c, and 122d, and controls the control target B125 that is connected via the signal wiring 124.

  Further, in the control device A101, the control modules 102a, 102b, 102c, and 102d connect adjacent control modules to each other by connecting connector portions (not shown) included in each of the control modules 102a, 102b, 102c, and 102d. Also in the control device B121, the control modules 122a, 122b, 122c, and 122d connect adjacent control modules to each other by connecting connector portions (not shown) included in each of the control modules 122a, 122b, 122c, and 122d. The connector unit includes a communication line that connects the transmission / reception port of the physical layer unit of the control module to the adjacent control module, and a communication line that connects the transmission / reception port of the physical layer unit via the capacitive element to the adjacent control module. It is out.

  In the control apparatus A101, the control module 102a includes an adapter 103a, and the control module 102d includes an adapter 103b. Also in the control device B121, the control module 122a includes the adapter 123a, and the control module 122d includes the adapter 123b.

  In each control device, an adapter provided in the control module at the end of the control module group consisting of a plurality of control modules, and an adapter provided in the control module at the end of the control module group of another control device, A network is configured by connecting via the communication cable 106. In FIG. 1, the adapter 103b of the control module 102d and the adapter 123a of the control module 123a are connected by the communication cable 106, and the control modules 102a, 102b, 102c, and 102d and the control modules 122a, 122b, 122c, and 122d are connected to the Ethernet. Configure the network.

  Note that the number of control devices and control targets is not limited to the above-described two sets, and the same applies to the case of three or more sets. The number of control modules in each control device is not limited to 4 units, and may be 2 units and 3 units, or 5 units or more.

  As described above, in the present embodiment, the control target A and the control target B arranged at remote locations are controlled by the control device A 101 and the control unit, respectively, while the control modules are connected to each other via Ethernet. It is characterized in that it is configured to be controlled by the device B121. In each of the control device A101 and the control device B121, a plurality of control modules are connected by a connector, and the control device A101 and the control device B121 that are arranged separately are provided in the control module at the end of the control module group. Connected with a communication cable.

  As described above, the present embodiment is characterized in that the control modules that can be installed close to each other at the same site are connected by connectors, and the remote control module groups are connected by a communication cable using an adapter. Since it comprises in this way, it becomes possible to connect between control modules by a data communication path in the state optimized according to the arrangement state of a control object.

  As a result, it is possible to simplify the wiring connecting the control modules compared to the case where all the control modules are connected using a communication cable, and the wiring work and maintenance work can be reduced. . In addition, since the control module group corresponding to each control object is arranged for each control object, there is no need to lay a signal wiring for connecting the control module group and the control object over a long distance. Is obtained.

  Next, the above-described control module and Ethernet connection between the control modules will be described in more detail using an example.

  FIG. 2 is a configuration diagram showing the configuration of the network system 1 that connects the control modules. The network system 1 is used as a network system such as a monitoring control system for monitoring and controlling building facilities and plant facilities, and executes a control module 10 (10A) that executes application software and provides various functions such as an information collection function and a control function. , 10B, 10C,...) Are connected in a ring shape via the data communication path L.

  Each control module 10 has a function of performing redundancy control processing for a data communication path based on RSTP (Rapid Spanning Tree Protocol). The data communication path L is a ring-shaped communication path that realizes data communication based on full-duplex Ethernet, and performs data transmission / reception between the control modules 10 in parallel. Communication lines Lx and Ly are provided.

  The control module 10 includes, as main functional units, a physical layer unit (PHY: first physical layer unit) 11, a physical layer unit (PHY: second physical layer unit) 12, a ring connection control unit 13, application processing A portion 14, a connector portion (first connector portion) 21, and a connector portion (second connector portion) 22 are provided.

  The physical layer unit 11 includes a dedicated communication circuit including a reception port P1r of the data communication path Lx and a transmission port P1t of the data communication path Ly, and an adjacent control module (first adjacent module) adjacent to one of the control modules 10 And a function of performing data transmission / reception in the physical layer via the control module) and the data communication path L.

  The physical layer unit 12 includes a dedicated communication circuit including a reception port P2r of the data communication path Ly and a transmission port P2t of the data communication path Lx, and is adjacent to the other control module 10 (second adjacent control module). And a function of performing data transmission / reception in the physical layer via the control module) and the data communication path L.

  The ring connection control unit 13 has a function of performing data communication with another control module 10 via the physical layer units 11 and 12, and a function of performing a redundancy control process for the data communication path L based on RSTP. have.

  The application processing unit 14 has a function of performing various application processes for monitoring and controlling, for example, building facilities and plant facilities, by performing data communication in the upper layer with another control module N via the ring connection control unit 13. doing.

  The connector unit 21 has a function of electrically connecting a data communication path between an adjacent control module adjacent to one of the control modules and the control module. The connector unit 22 has a function of electrically connecting a data communication path between an adjacent control module adjacent to the other of the control modules and the control module.

  Thereby, for example, when the control modules 10A to 10C are installed adjacent to a mount such as a DIN rail, the connector portion 21 of the control module 10B is connected to the connector portion 22 of one adjacent control module (first adjacent control module) 10A. At the same time, the connector part 22 of the control module 10B is connected to the connector part 22 of the other adjacent control module (second adjacent control module) 10C.

  First, in the network system 1, the physical layer unit is connected to the connector unit 21 via the communication line L1 that connects the reception port P1r of the physical layer unit 11 of the control module to one adjacent control module and the capacitor (capacitance element) C1. 11 communication ports L1 that connect 11 transmission ports P1t to one adjacent control module. In addition, a transmission line P2t of the physical layer unit 12 is connected to the connector unit 22 via a communication line L3 that connects the reception port P2r of the physical layer unit 12 of the control module to the other adjacent control module and a capacitor (capacitance element) C2. Is connected to the other adjacent control module. In this configuration, by connecting the connector line 21 to the connector part 22 of one adjacent control module, the communication line L1 of the control module is connected to the communication line L4 of one adjacent control module. The communication line L2 of the control module is connected to the communication line L3 of one adjacent control module.

  Next, the configuration and operation of the network system 1 and the control module 10 will be described in detail with reference to FIG. In FIG. 2, the pair of communication lines L1 to L10 are omitted and displayed as a single line.

  The connector portion 21 is provided with a connector CN1, a capacitor C1, and communication lines L1, L2, and L5. The connector CN <b> 1 is a connector for electrically connecting the adjacent control module adjacent to one of the control modules 10 and the data communication path L between the control module 10. The capacitor C1 is an insulating capacitor that insulates the DC potential difference between the control module 10 and the data communication path L3 of the adjacent control module. The communication line L1 is a communication line for the data communication path Lx that connects the connector CN1 and the reception port P1r of the physical layer unit 11. The communication line L2 is a communication line for the data communication path Ly that connects the connector CN1 and the transmission port P1t of the physical layer unit 11 via the capacitor C1. The communication line L3 is a communication line for the data communication path Ly that connects the connector CN1 and the transmission port P1t of the physical layer unit 11.

  The connector portion 22 is provided with a connector CN2, a capacitor C2, and communication lines L3, L4, and L6. The connector CN <b> 2 is a connector for electrically connecting the data communication path L between the adjacent control module adjacent to the other of the control module 10 and the control module 10. The capacitor C2 is an insulating capacitor that insulates a DC potential difference between the data communication path L1 between the control module 10 and the adjacent control module. The communication line L4 is a communication line for the data communication path Ly that connects the connector CN1 and the reception port P2r of the physical layer unit 12. The communication line L5 is a communication line for the data communication path Lx that connects the connector CN2 and the transmission port P2t of the physical layer unit 12 via the capacitor C2. The communication line L6 is a communication line for the data communication path Lx that connects the connector CN2 and the transmission port P2t of the physical layer unit 12.

  In the network system 1, the adapters 31 and 32 are connected to both ends of the control modules 10 arranged adjacent to each other.

  The adapter 31 is provided with connectors CN11 and CN12, termination transformers T1x and T1y, and communication lines L7 and L8. The connector CN11 is a connector for electrically connecting the data communication path L with the control module 10 to which the adapter 31 is connected. The connector CN (first cable connector) 12 is a connector for connecting a communication cable (first communication cable) LU1 constituting the data communication path L, for example, a connector such as RJ-45. The termination transformers T1x and T1y are termination transformers that insulate the DC potential differences between the control module 10 and the data communication paths Lx and Ly of the communication cable LU1 and terminate the terminals by matching impedances. The communication line L7 is a communication line for the data communication path Lx that connects the connector CN11 and the cable connector CN12 via the termination transformer T1x. The communication line L8 is a communication line for the data communication path Ly that connects the connector CN11 and the cable connector CN12 via the termination transformer T1y.

  The adapter 32 is provided with connectors CN21 and CN22, termination transformers (Transformers) T2x and T2y, and communication lines L9 and L10. The connector CN21 is a connector for electrically connecting the data communication path L with the control module 10 to which the adapter 32 is connected. The connector CN22 (second cable connector) is composed of a connector such as RJ-45, for example, and is a cable connector for connecting a communication cable (second communication cable) LU2 constituting the data communication path L. The termination transformers T2x and T2y are termination transformers that insulate the DC potential differences between the control module 10 and the data communication paths Lx and Ly of the communication cable LU2 and terminate the terminals by matching impedances. The communication line L9 is a communication line for the data communication path Ly that connects the connector CN21 and the cable connector CN22 via the termination transformer T2y. The communication line L10 is a communication line for the data communication path Lx that connects the connector CN21 and the cable connector CN22 via the termination transformer T2x.

  FIG. 3 shows a connector arrangement example of the control module and the adapter. Here, connectors CN1 and CN2 are disposed laterally at the left and right side end portions 10L and 10R of the back surface of each control module 10 so that the connection terminals face the adjacent control module side. Accordingly, as shown in FIG. 2, when the control modules 10A, 10B, and 10C are arranged adjacent to each other, the connector CN1 of the control module 10B is engaged with the connector CN2 of the control module 10A, and the connector CN2 of the control module 10B is controlled. This is mated with the connector CN1 of the module 10C. Thereby, the adjacent control modules 10 are connected without using a communication cable.

  In addition, a connector CN11 is disposed laterally on the right end 31R of the back surface of the adapter 31 so that the connection terminal faces the adjacent control module, and the connection terminal is connected to the left end 32L of the back surface of the adapter 32. A connector CN21 is arranged sideways so as to face the adjacent control module side. As a result, as shown in FIG. 2, the adapter 31 is arranged adjacent to the control module 10A located at one end of the adjacently arranged control modules 10A, 10B, 10C, and the adapter 32 is connected to the control module 10C located at the other end. Are adjacent to each other, the connector CN11 of the adapter 31 engages with the connector CN1 of the control module 10A, and the connector CN21 of the adapter 32 engages with the connector CN2 of the control module 10C. As a result, the control module 10A is connected to the communication cable LU1, the control module 10C is connected to the communication cable LU2, and the data communication paths L of the adjacently arranged control modules 10A, 10B, and 10C are arranged at remote locations. Connected to other control modules via communication cables LU1 and LU2.

  FIG. 4 is an explanatory diagram showing a connection form between the control modules in the network system 1, and a connection form between the control modules 10A and 10B in FIG. 2 is shown as an example. As shown in FIG. 4, when the control modules 10A and 10B are arranged adjacent to each other, the connector CN2 of the control module 10A and the connector CN1 of the control module 10B are connected, and the communication line L4 of the control module 10A and the control module 10B are connected. The communication line L1 is connected, and the communication line L3 of the control module 10A and the communication line L2 of the control module 10B are connected.

Thereby, the transmission port P2t of the transmission circuit TR provided in the physical layer unit 12 of the control module 10A is connected to the reception circuit provided in the physical layer unit 11 of the control module 10B via the insulation capacitor C2 of the communication line L6. Connected to the RV reception port P1r, a pair of communication paths for the data communication path Lx is formed.
The transmission port P1t of the transmission circuit TR provided in the physical layer unit 11 of the control module 10B is connected to the reception circuit RV provided in the physical layer unit 12 of the control module 10A via the insulation capacitor C1 of the communication line L3. And a pair of communication channels for the data communication channel Ly are formed.

  In this way, the adjacent control modules 10 are connected by the connector portions 21 and 22, respectively, to form two independent data communication paths Lx and Ly. As a result, a full-duplex Ethernet system is constructed in which adjacent control modules 10 are connected in a daisy chain without using a communication cable.

  FIG. 5 is an explanatory diagram showing a connection form between the control module and the adapter in the network system 1, and a connection form between the control module 10A and the adapter 31 in FIG. 2 is shown as an example.

  As shown in FIG. 5, when the control module 10A and the adapter 31 are arranged adjacent to each other, the connector CN1 of the control module 10A and the connector CN11 of the adapter 31 are connected, and the communication line L1 of the control module 10A and the adapter 31 are connected. The communication line L7 is connected, and the communication line L5 of the control module 10A and the communication line L8 of the adapter 31 are connected.

  As a result, the reception port P1r of the reception circuit RV provided in the physical layer unit 11 of the control module 10A is connected to the cable connector CN12 of the adapter 31 via the termination transformer T1x of the communication line L1 to the communication line L7. A communication path for the communication path Lx is formed. Further, the transmission port P1t of the transmission circuit TR provided in the physical layer unit 11 of the control module 10A is connected to the cable connector CN12 of the adapter 31 via the termination transformer T1y of the communication line L2 to the communication line L8, and data communication is performed. A communication path for the path Ly is formed.

  FIG. 6 is an explanatory diagram showing another connection form between the control module and the adapter in the network system 1, and a connection form between the control module 10C and the adapter 32 in FIG. 2 is shown as an example.

  As shown in FIG. 6, when the control module 10C and the adapter 32 are arranged adjacent to each other, the connector CN2 of the control module 10C and the connector CN21 of the adapter 32 are connected, and the communication line L3 of the control module 10C and the adapter 32 are connected. The communication line L9 is connected, and the communication line L6 of the control module 10C and the communication line L10 of the adapter 32 are connected.

  As a result, the transmission port P2t of the transmission circuit TR provided in the physical layer unit 12 of the control module 10C is connected to the cable connector CN22 of the adapter 32 from the communication line L6 via the termination transformer T2x of the communication line L10. A communication path for the communication path Lx is formed. Also, the reception port P2r of the reception circuit RV provided in the physical layer unit 12 of the control module 10C is connected to the cable connector CN22 of the adapter 32 via the termination transformer T2y of the communication line L9 to the communication line L9, and data communication A communication path for the path Ly is formed.

  In this way, the adjacent control module 10A is connected to the adapter 31 by the connector portion 21, and the two independent data communication paths Lx and Ly are connected to the communication cable LU1. Further, the adjacent control module 10C is connected to the adapter 32 by the connector unit 22, and the two independent data communication paths Lx and Ly are connected to the communication cable LU2.

  FIG. 7 is an example of connection between control module groups using communication cables. FIG. 8 is a configuration example of a network system based on the connection example of FIG. Here, as shown in FIG. 2, among the control module group consisting of control modules N1, N2, and N3 arranged adjacent to each other and the control module group consisting of control modules N4, N5, and N6 arranged adjacent to each other, the control module The adapter A1 connected to N1 and the adapter A3 connected to the control module N6 are connected via the communication cable LU1, and the adapter A2 connected to the control module N3 and the adapter A4 connected to the control module N4 communicate with each other. They are connected via a cable LU2.

  As a result, as shown in FIG. 8, a plurality of control module groups arranged at remote locations are connected via communication cables LU1 and LU2, and a full-duplex Ethernet system that connects these control modules N1 to N6 in a ring shape. Is built.

  FIG. 9 is an explanatory diagram showing a connection form between a connector and a communication line. As shown in FIG. 9, the connectors CN1 and CN2 of the control module 10 and the connector CN11 of the adapter 31 use more connection terminals than the number of communication lines of the data communication paths Lx and Ly. As shown in FIGS. 4 to 6, since the data communication paths Lx and Ly are each composed of a pair of communication lines, two sets of communication lines, that is, a total of four communication lines are required. In contrast, in the present embodiment, the connectors CN1, CN2, and CN11 are provided with four sets of communication lines, that is, four connection terminal sets J1 to J4 that connect a total of eight communication lines. In FIG. 9, a pair of communication lines is omitted with one line.

Specifically, no communication line is connected to the connector CN1, a connection terminal set J1 that is electrically open, a connection terminal set J2 to which the communication line L1 is connected, and a communication line L3 including a capacitor C1. Are connected and a connection terminal set J3 and a connection terminal set J4 to which the communication line L5 is connected are provided.
The connector CN2 is connected to the connection terminal set J1 to which the communication line L6 is connected, the communication line L4 including the capacitor C2 is connected to the connection terminal set J2, the connection terminal set J3 to which the communication line L3 is connected, and the open state. A connection terminal set J4 is provided.
Further, the connector CN11 is connected to the connection terminal set J1, J3 in the open state, the connection terminal set J2 connected to the communication line L7 including the termination transformer T1x, and the connection terminal set J4 connected to the communication line L8 including the termination transformer T1y. Is provided.

  Thereby, when the connector CN2 of the other control module 10 is connected to the connector CN1 of one control module 10, the connection terminal set J1 of the connector CN1 and the connection terminal set J4 of the connector CN2 are in an open state. Thus, the connection terminal set J2, J3 of the connector CN1 is connected to the connection terminal set J2, J3 of the connector CN2. Accordingly, since the communication lines L1 and L3 of one control module 10 are connected to the communication lines L4 and L3 of the other control module 10, respectively, the DC potential difference is insulated by the capacitors C1 and C2, as shown in FIG. In this state, the control modules 10 are connected.

  On the other hand, when the connector CN11 of the adapter 31 is connected to the connector CN1 of the control module 10, since the connection terminal set J1, J3 of the connector CN11 is in an open state, the connection terminal set J2, J4 of the connector CN1 is connected to the connector CN1. It is connected to the connection terminal set J2 and J4 of CN11. Accordingly, since the communication lines L1 and L5 of the control module 10 are connected to the communication lines L7 and L8 of the adapter 31, respectively, as shown in FIG. 5, the control is performed with the DC potential difference insulated by the termination transformers T1x and T1y. The module 10 and the adapter 31 are connected.

  Thereby, only when another control module 10 is connected to the control module 10, the capacitors C1 and C2 are inserted into the data communication paths Lx and Ly connecting the two. Further, when the adapter 31 is connected to the control module 10, the capacitors C1 and C2 that are unnecessary for the connection with the communication cable are eliminated from the data communication paths Lx and Ly connecting the two, and the connection with the communication cable is performed. Only the termination transformers T1x and T1y required for the above are inserted into the data communication paths Lx and Ly, respectively.

  Therefore, the connector CN2 of the other control module 10 and the connector CN11 of the adapter 31 can be commonly connected to the connector CN1 of the control module 10 without requiring a circuit switching switch.

  FIG. 10 is an explanatory diagram showing another connection form between the connector and the communication line. As shown in FIG. 10, like the adapter 31, the connector CN <b> 11 of the adapter 32 uses more connection terminals than the number of communication lines of the data communication paths Lx and Ly. Accordingly, the connector CN21 is also provided with four sets of communication lines, that is, four connection terminal sets J1 to J4 for connecting a total of eight communication lines. In FIG. 10, a pair of communication lines is omitted with one line.

  Specifically, the connector CN21 has a connection terminal set J1 to which a communication line L10 including a termination transformer T2x is connected, a connection terminal set J3 to which a communication line L9 including a termination transformer T2y is connected, and an open connection terminal set. J2 and J4 are provided. The connection terminal sets J1 to J4 of the connectors CN1 and CN2 are the same as those in FIG.

  Thereby, when the connector CN1 of the other control module 10 is connected to the connector CN2 of one control module 10, the connection terminal set J1 of the connector CN1 and the connection terminal set J4 of the connector CN2 are in an open state. Thus, the connection terminal set J2, J3 of the connector CN1 is connected to the connection terminal set J2, J3 of the connector CN2. Accordingly, since the communication lines L4 and L3 of one control module 10 are connected to the communication lines L1 and L2 of the other control module 10, respectively, the DC potential difference is insulated by the capacitors C1 and C2 as shown in FIG. In this state, the control modules 10 are connected.

  On the other hand, when the connector CN21 of the adapter 32 is connected to the connector CN2 of the control module 10, the connection terminal set J2 and J4 of the connector CN21 are in an open state, so the connection terminal set J1 and J3 of the connector CN2 It is connected to the connection terminal set J1, J3 of CN21. Therefore, since the communication lines L6 and L3 of the control module 10 are respectively connected to the communication lines L10 and L9 of the adapter 32, the control is performed in a state where the DC potential difference is insulated by the termination transformers T2x and T2y as shown in FIG. The module 10 and the adapter 32 are connected.

  Thereby, only when another control module 10 is connected to the control module 10, the capacitors C1 and C2 are inserted into the data communication paths Lx and Ly connecting the two. Further, when the adapter 32 is connected to the control module 10, the capacitors C1 and C2 unnecessary for connection with the communication cable are eliminated from the data communication paths Lx and Ly connecting the two, and the connection with the communication cable is performed. Only the termination transformers T2x and T2y required for the above are inserted into the data communication paths Lx and Ly, respectively.

  Therefore, the connector CN1 of the other control module 10 and the connector CN21 of the adapter 32 can be commonly connected to the connector CN2 of the control module 10 without requiring a circuit switching switch.

  Each control module 10 may be provided with two control module bypass communication lines that pass through the control module 10 and directly connect the connector portion 21 and the connector portion 22. These communication lines are each composed of a pair of communication lines and are not connected to circuit units such as the physical layer units 11 and 12 of the control module 10. Thereby, for example, when the connector CN1 provided in the connector part 21 of the module 10B and the connector CN2 provided in the connector part 22 of the module 10A are connected, the communication line for bypassing the module 10B is used for bypassing the module 10A. Connected to the communication line. In this way, the bypass communication line can be used as a redundant path of the data communication paths Lx and Ly.

  It should be noted that the present invention is not limited to the embodiment described above, and that many modifications can be implemented by those having ordinary knowledge in the art within the technical idea of the present invention. It is obvious. For example, the control modules may be connected by a daisy chain that is not a loop connection.

  DESCRIPTION OF SYMBOLS 101 ... Control apparatus A, 102a, 102b, 102c, 102d ... Control module, 103a, 103b ... Adapter, 104 ... Signal wiring, 105 ... Control object A, 106 ... Communication cable, 121 ... Control apparatus B, 122a, 122b, 122c 122d, control module, 123a, 123b, adapter, 124, signal wiring, 125, control target B.

Claims (1)

At least a first control module group and a second control module group composed of a plurality of control modules connected via a data communication path, a first control object controlled by the first control module group, and the second second and a control object, wherein the first control module group and the first control object and the second control module group and the second respective signals with the control object for controlling the control modules is In a supervisory control system connected via a line,
The control module includes a first connector unit that electrically connects the first adjacent control module adjacent to one of the control modules and the control module, and a second adjacent control adjacent to the other of the control modules. A second connector portion for electrically connecting the module and the control module;
The first connector portion is
A first communication line connecting a reception port (transmission port) of the first physical layer part of the control module with the first adjacent control module;
A second communication line connecting a transmission port (reception port) of the first physical layer unit with the first adjacent control module via a capacitive element;
The second connector portion is
A third communication line for connecting a reception port (transmission port) of the second physical layer unit of the control module to the second adjacent control module;
A fourth communication line connecting a transmission port (reception port) of the second physical layer unit with the second adjacent control module via a capacitive element;
The first connector portion is connected to the second connector portion of the first adjacent control module, thereby connecting the first communication line of the control module to the fourth of the first adjacent control module. And connecting the second communication line of the control module with the third communication line of the first adjacent control module,
The first connector unit further includes a fifth communication line that connects a transmission port (reception port) of the first physical layer unit with the first adjacent control module;
The second connector unit further includes a sixth communication line that connects a transmission port (reception port) of the second physical layer unit with the second adjacent control module,
A first cable connector for connecting a communication cable constituting the data communication path; and connecting to the first connector portion of the control module, whereby the first and fifth communication lines of the control module A first adapter that connects the first cable connector with a communication line via a separate termination transformer,
Including a second cable connector for connecting another communication cable constituting the data communication path, and by connecting to the second connector portion of the control module, the third and sixth of the control module A second adapter for connecting the communication line to the second cable connector by a communication line via a separate termination transformer,
The monitoring control system, wherein the first adapter of the first control module group and the second adapter of the second control module group are connected by a communication cable.

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