JPH01133448A - Inter-device transmitting system - Google Patents

Abstract

PURPOSE:To eliminate the necessity of time monitoring to be carried out by means of a host CPU by setting a time-out time in a command when the command is transmitted from the host CPU to an ID controller. CONSTITUTION:A host CPU 3 produces an auto-read command or auto-write command and transmits the command to a CPU 30 in an ID controller 5 after setting a time-out time in the command. The CPU 30 discriminates whether a data carrier 1 approaches a read/write head 2 or not and when it is discriminated that the carrier 1 not approach the head 2, discriminates whether or not timer out has come in accordance with the time-out time in the received command. When the time-out time elapses, the CPU 30 produces a time-out response and transmits the response to the host CPU 3. Since it is not required to monitor time to the host CPU 3, the CPU 3 can executes another process during the period.

Description

Detailed Description of the Invention (A) Field of the Invention The present invention relates to inter-device transmission in which a first device such as a host computer instructs a second device such as an ID controller to execute a process via a transmission medium. Regarding the method.

(B) Background of the Invention Conventionally, in a factory, for example, when sorting shipments for home delivery, a pallet with a data carrier attached as a third device is placed on a belt conveyor, and the shipments are placed on this pallet. While storing the address of the pallet and the type of shipment, etc. in the data carrier mentioned above, a first device such as a host computer is installed in the operator room or computer room, and the first device such as a host computer is installed in the operator room or computer room. A second device such as a 10 controller is installed in the 10 controller, and a read/write head for reading and writing information on the data carrier described above is connected to the second device, so that the information is transmitted from the host computer (first device) via a transmission medium. When the data carrier (third device) approaches, the ID controller controls the read/write head in accordance with the above-mentioned command content, and uses this read/write head to execute the process. There is an inter-device transmission system configured to sequentially sort out parcels for home delivery by reading and writing data on data carriers on pallets.

In such a device 1 transmission method, the above-mentioned ID controller (second device) receives a command from the host computer (first device) and transmits the data carrier (third device).
Processing is executed upon approach, and after the processing is executed, the above-mentioned ID controller (second device) connects to the host computer (first device).
Send a response to.

In this case, the above-mentioned data carrier (third device) may not be able to access the read/write head due to system failure or other causes, so the above-mentioned host computer (first device) monitors the time and ID controller(
When a response is not sent from the ID controller (second device) for a predetermined period of time or more, the host computer (first device) sends a command to terminate the process to the ID controller (second device).

In this way, in the conventional device 1 transmission method, it is necessary for the host computer (first device) to monitor the time, so during this time monitoring, other processing cannot be performed, and the processing cannot be terminated. Since it is necessary to transmit commands, the number of transmissions increases, and the increased number of transmissions increases the probability of occurrence of transmission errors.

(C) Purpose of the Invention This invention eliminates the need for time monitoring in the first device consisting of a main computer such as a host computer, allows other processing to be executed during this time, and allows for commands to terminate processing to be executed. An object of the present invention is to provide an inter-device transmission method that does not require transmission and can reduce the number of transmissions and the transmission error rate.

(D) Structure of the Invention This invention instructs a second device to execute processing from a first device via a first transmission medium, and the second device
An inter-device transmission method for reading and writing memory data in the third device when approaching a third device via a transmission medium, wherein a timeout period is set during a command sent from the first device to the second device. , and when the third device does not approach the second device even after the timeout period has elapsed, the second device transmits a timeout error response to the first device. Features.

(E) Effect of the Invention According to this invention, since the timeout time is specified in the command sent from the first device to the second device, the third device approaches the second device during the timeout period. If not, the second device creates an error response indicating timeout and sends the created error response to the first device.

(F) Effects of the Invention As a result, the first device comprising a host computer or the like does not need to monitor time, and has the advantage of being able to perform other processing.

Furthermore, since there is no need to send a command to terminate processing as in the conventional method, it is possible to reduce the number of transmissions between the first and second devices ts and to reduce the transmission error rate.

(g) Examples of the invention An embodiment of the present invention will be described in detail below based on the drawings.

The drawing is the device! 1F! In J.
The transmission device used in this method includes a data carrier 1 as a third device attached to a pallet or the like on a belt conveyor, and a read device that reads (reads) and writes (writes) stored information to this data carrier 1. A write head 2, a host computer 3 as a first device, and an ID controller 5 as a second device connected to the host computer 3 via a transmission medium 4 (here 10 is 1d).
(abbreviation for identification),
This ID controller [+-55] and the above-mentioned read/write head 2 are connected by a cable 6.

As shown in FIG. 2, the data carrier 1 described above is provided with an electromagnetic coil 8 wound around a coil spool 7, and one end of the electromagnetic coil 8 is equipped with a rectifier 9, which separates a signal wave from a modulated wave. Connect the demodulator 10 to be extracted from the demodulator 1.
EEP ROM (e
Electrically erasable proar
ami+ablc ROM, electrically rewritable RO
A carrier memory 12 constituted by M (abbreviation: EAROM) is connected to the carrier memory 12, and necessary data such as pallet addresses and shipping baggage classifications are stored in a rewritable manner.

Further, while the rectified output of the rectifier 9 described above is used as a power source for the control circuit 11, a modulator 13 is connected to the control circuit 11 to change the carrier wave in accordance with changes in the signal wave.

Further, a first capacitor 14 and a series circuit of a second capacitor 15 and a contact 16 are connected in parallel to both ends of the electromagnetic coil 8 described above.

The aforementioned read/write head 2 is electromagnetically coupled to the data carrier 1, and bidirectionally transmits and receives data through mutual induction.

This read/write head 2 connects both ends of an electromagnetic coil 18 wound around a coil spool 17 to a transmitter 19, and also connects a third capacitor 22 between connection lines 20 and 21.
It is constructed by intervening.

The above-described host computer 3 includes a host CPLJ 23 and a transmission circuit 24, and transmits read and write commands according to the program stored in the host memory 25, and also specifies a timeout time in this command.

Note that the above timeout period is specified in the program.
It can be specified by manual key operation.

The ID controller 5 connected to the host computer 3 via the above-mentioned transmission medium 4 includes a host transmission circuit 26, a power supply section 27, a memory 28, a battery 29 for retaining the memory 28, and a CPLJ 30. The aforementioned ten transmitters 19 are connected via a modulator 31 and a transmission line 32, and a CPU 30 is connected to the ten transmitters 19 via a reception line 33 and a demodulator .

This ID controller 5 is connected to the host computer 3.
In response to read and write commands from , the carrier memory 12 is read and written via the read/write head 2 described above, and the results are sent as a response to the host computer 3 .

The illustrated embodiment is configured as described above, and the transmission system will be explained below with reference to the flowchart of FIG.

In a first step 41, the host CPU 23 creates an auto-read command or an auto-write command, and specifies a time-out time corresponding to, for example, 3 seconds in this command.

Next, in a second step 42, the upper CPU 23 transmits the created command to the transmission circuit 24, the transmission medium 4, and the upper transmission circuit 2.
6 to the CPU 30 in the ID controller 5.

Next, in a third step 43, the above-mentioned CPU 30 receives a command.

Next, in a fourth step 44, the CPtJ 30 determines whether the data carrier 1 as the third device approaches the read/write head 2 or not.

That is, when the data carrier 1 approaches the read/write head 2, the electromagnetic coil 8
An electromotive force is generated, and the signal emitted at this initial time is sent to C via the read/write head 2 as status data.
By replying to PU30, the approach of data carrier 1,
Determine non-approach.

When the CPtJ 30 determines in the fourth step 44 that the data carrier 1 has approached the read/write head 2, the process moves to the next fifth step 45.

In this fifth step 45, the CPU 30 controls the read/write head 2 according to the command contents, and reads/writes the stored information in the carrier memory 12 in the data carrier 1 via the read/write head 2. Execute processing.

Next, in a sixth step 46, the CPU 30 creates a normal response as a read/write result of the carrier memory 12.

Thank you... ! Next, in a seventh step 47, the CPU 30 transmits the created normal response to the higher-level CPU 23 of the higher-level computer 3 via the higher-level transmission circuit 26, transmission medium 4, and transmission circuit 24.

Next, in an eighth step 48, the host CPU 23 receives the above-mentioned normal response and ends the series of processing corresponding to one command.

By controlling the transmission in this manner, storage information is read from and written to the data carrier 1 attached to the pallet on the belt conveyor, and the shipment items on the pallet are sorted and processed.

By the way, if the CPU 30 determines in the fourth step 44 that the data carrier 1 has not yet approached the read/write head 2, the process moves to the next ninth step 49.

In this ninth step 49, the CPU 30 determines whether or not there is a timeout based on the timeout time in the already received command.
If sec has not elapsed, proceed to the fourth step 4 described above.
On the other hand, when the timeout period elapses,
The process moves to the next tenth step 50.

In this tenth step 50, the CPU 30 outputs a timeout indicating that the data carrier 1 as the third device did not approach the read/write head 2 connected to the ID controller 5 as the second device within a time period and a timeout occurred. Create an error response.

Next, the process moves to the aforementioned seventh step 47, and in this seventh step 47, the CPU 30 sends the created timeout error response to the host CPU 23 of the host computer 3 via the host transmission circuit 26, transmission medium 4, and transmission circuit 24. After the transmission, in the next eighth step 48, the host CPU 23 receives the above-mentioned timeout error response, and ends the series of processing at the time of non-approach.

In short, since the timeout time is specified in the command sent from the host computer 3 to the ID controller 5, the data carrier 1
0 controller 5, this ID controller 5 creates an error response indicating timeout and sends this created error response to the host computer 3.

As a result, the above-mentioned host computer 3 does not need to perform time monitoring as in the conventional case, and has the advantage of being able to perform other processing during this time. In addition, since there is no need to send a command to terminate processing as in the conventional method, the number of transmissions between the host computer 3 and the 10-con controller 5 is reduced, and the probability of occurrence of transmission errors is reduced. It has the effect of

In the correspondence between the configuration of the present invention and the above-described embodiment, the first device of the present invention corresponds to the host computer 3 of the embodiment, and the second device similarly corresponds to the ID head 2 including the read/write head 2. The third device corresponds to the controller 5, the third device corresponds to the data carrier 1, the first transmission medium corresponds to the transmission medium 4, and the second transmission medium corresponds to the cable 6.
However, the present invention is not limited to the configuration of the above-described embodiment.

In addition, in the above embodiment, the sorting of outgoing parcels for home delivery was explained as an example, but it goes without saying that this inter-device transmission method may be applied to auto tool changers and other fields. It is not limited to only sorting.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a system diagram of a transmission device used in the inter-device transmission system; Fig. 2 is a block diagram of the transmission device; and Fig. 3 is a flowchart showing transmission processing. be. 1... Data carrier 2... Read/write head 3... Host computer 4... Transmission medium 5...
ID controller 6... Cable Diagram 1 Ryo 1 Notification public law method l; Use 1) Thread north diagram of Hongu printing equipment 1... Dake carrier 2... 1 No. 1 light head Diagram 3 Shows the process of suriha flowchart

Claims (1)

[Claims] (1) The first device instructs the second device to execute a process via the first transmission medium, and when the second device approaches a third device via the second transmission medium, An inter-device transmission method for reading and writing memory data, wherein a timeout period is specified in a command sent from the first device to the second device, and the third device does not function even after the timeout period has elapsed. An inter-device transmission method for transmitting a timeout error response from the second device to the first device when the second device is not approached.