JP3044665B2 - Control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a control device such as a copying machine, and more particularly, to a control device capable of detecting insertion errors of a plurality of nonvolatile memories.

(Prior art)

Generally, in order to detect an abnormality in a nonvolatile memory such as an EPROM connected to a control device, check data stored in advance in the nonvolatile memory is read out, and a determination is made based on whether or not the check data is abnormal.

The same method is used for a control device including a plurality of nonvolatile memories.

Normally, when a defect occurs in other components of the board of the control device, for example, an IC, the nonvolatile memory connected to the defective board is removed, and the removed nonvolatile memory is connected to a new board. Make a check.

At this time, if the read check data of the nonvolatile memory is normal, the nonvolatile memory is used as it is,
If abnormal, this nonvolatile memory is also replaced.

[Problems to be solved by the invention]

According to the above-described conventional check method, when a board failure of a control device including a plurality of nonvolatile memories occurs, when the plurality of nonvolatile memories removed from the defective board to a new board are incorrectly connected at the connection locations. At this time, the check data of the volatile memory becomes abnormal.

In this case, even if the nonvolatile memory is simply inserted incorrectly, it may be determined that the nonvolatile memory itself is defective without noticing the incorrect connection due to the abnormality in the check data.

Therefore, an object of the present invention is to provide a control device capable of detecting both a defect and a wrong insertion of a plurality of nonvolatile memories.

[Means for solving the problem]

In order to achieve the above object, a first invention is a control device including a plurality of nonvolatile memories, wherein an identification number storage area provided in each of the nonvolatile memory areas for storing an identification number; A check data storage area provided in each of the nonvolatile memory areas for storing check data of the nonvolatile memory, and the identification of the nonvolatile memory after the nonvolatile memory is connected to the control device. Identification number checking means for reading and checking an identification number stored in a number storage area, and check data stored in the check data storage area of the nonvolatile memory after the nonvolatile memory is connected to the connection device. Data checking means for reading and checking the data, and checking by the identification number checking means and the data checking means. The determination means for determining that the respective nonvolatile memories and the connection thereof are normal when both the memories are normal, and the other nonvolatile memory when the check by the identification number checking means is abnormal. And a plug-in mis-judgment means for checking the coincidence with the identification number.

Further, the second invention is configured as a control device characterized by further adding a replacement means for replacing data stored in the non-volatile memory when a wrong insertion is determined by the wrong insertion determination means.

[Action]

Since the control device according to the first aspect of the present invention is configured as described above, when the nonvolatile memory is connected to the control device and the power is turned on, the identification number check unit outputs the identification number storage area. Is read and checked.

Further, the check data stored in the check data storage area is read and checked by the data check means.

Then, when the identification number check means and the data check means both check normally, the judgment means judges that the respective non-volatile memories and their connections are normal.

Further, when the check by the identification number checking means is abnormal, the wrong insertion judgment means checks the coincidence with the identification numbers of the other nonvolatile memories.

If the insertion is incorrect, the content of the insertion is displayed on the display unit, for example.

Therefore, it is possible to easily detect a difference in insertion of a plurality of nonvolatile memories.

In the control device according to the second aspect of the invention, when the wrong insertion is determined by the wrong insertion determining means, the data stored in the nonvolatile memory is further replaced by the replacing means.

Therefore, the trouble of replacing the nonvolatile memory can be further reduced.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

FIG. 1 is a block diagram of a control device according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing a storage area of a nonvolatile memory of the control device, and FIG. 3 is a check of the nonvolatile memory of the control device. It is a flowchart which shows a process.

The control device 1 shown in FIG. 1 has a microcomputer (hereinafter referred to as a CPU) 2 as a center, and a ROM
3. The nonvolatile memory A, the nonvolatile memory B, the input unit 4, the output unit 5, and the display unit 6 are connected.

As shown in FIG. 2, the non-volatile memories A and B have connectors α and β which are connection locations of the control device 1, respectively.
(Broken line) and connected.

In the respective memory areas of the nonvolatile memories A and B, as shown in FIG. 2, identification number storage areas A ₁ and B for storing respective identification numbers of the nonvolatile memories A and B are provided.
₁ and check data storage areas A ₂ and B ₂ for storing respective check data of the nonvolatile memories A and B are provided. However, such a storage area is virtual, and in many cases, data is actually stored at random, and the following storage areas include such a case.

The identification numbers and check data of the nonvolatile memories A and B are stored in the respective storage areas A ₁ , B ₁ , A ₂ , B
₂ is written in advance.

The ROM 3 previously stores the processing contents of the sequence program of the control device 1, the identification numbers of the nonvolatile memories A and B, check data, and the like.

For example, in a control device 1 such as a copying machine, when a copy command or the like is input to the input unit 4, a copy process or the like is performed according to a predetermined sequence stored in the ROM 3.

Next, referring to FIG. 3, steps S1, S2,... Of the check processing procedure of the nonvolatile memories A and B of the control device 1 will be described.
Will be described in this order.

The nonvolatile memories A and B are connected to the respective connectors α and β of the control device 1, and when the power is further turned on, the control device 1 is initialized (S1).

Then, the identification number storage area A ₁ and the check data storage area of the nonvolatile memory A, which is connected to the connector α
Identification stored in the A ₂ number and check data CP
Read by U2 (S2).

Further, it is determined whether or not the read identification number matches the identification number stored in the ROM 3 (that is, the identification number of the nonvolatile memory A at the connection location (connector α)) (S3). Move to step S4.

Means for implementing the function of checking by reading the identification number stored in the identification number storage area A ₁ of the above-mentioned non-volatile memory A is an example of the identification number checking means.

In the next step S4, it is determined whether or not the check data read in S2 matches the check data in the nonvolatile memory A stored in the ROM 3, and if not, it is determined that the nonvolatile memory A is abnormal ( S8) If they match, the process moves to the next step S5.

Check data storage area of nonvolatile memory A described above
Means for implementing the function of checking by reading the check data stored in A ₂ is an example of a data checking unit.

Furthermore, the identification number storage area B ₁ and the check data storage area B ₂ to the stored identification number and the check data in the nonvolatile memory B connected to the next step S5 connector β is read by CPU 2.

Then, it is determined whether or not the read identification number matches the identification number stored in the ROM 3 (that is, the identification number of the nonvolatile memory B at the connection location (connector β)) (the identification number checking means). Further, it is determined whether the read check data matches the check data of the nonvolatile memory B stored in the ROM 3 (the data check means) (S6).

In this step S6, if any one of the identification number and the check data does not match, it is determined that the nonvolatile memory B is abnormal (S9). If both the identification number and the check data match, the nonvolatile memory B is normal. It is determined that there is, and the process proceeds to the next step S7.

In the next step S7, for example, the display unit 6 displays that the nonvolatile memories A and B and their connections are normal.

The identification numbers and check data of the series (S2, S3, S4, S5, S6) described above are read, and if both the read identification numbers and the check data are normal, the nonvolatile memories A and B and their connections The means for realizing the function of determining that the is normal is an example of the determination means.

Further, a case will be described in which the nonvolatile memory B is connected to the connector α of the nonvolatile memory A and the nonvolatile memory A is connected to the connector β of the nonvolatile memory B by mistake.

When the power is turned on after the connection, the control device 1 is initialized (S1).

Then, the identification number storage area B ₁ and the check data storage area B ₂ to the stored identification number and the check data in the nonvolatile memory B connected is read by CPU2 wrong connector α of the non-volatile memory A ( S
2).

Further, it is determined whether or not the read identification number matches the identification number stored in the ROM 3 (that is, the identification number of the nonvolatile memory A at the connection location (connector α)) (the identification number checking means). (S3).

In the above S3, since the connection of the non-volatile memory is wrong, it is naturally determined that the identification numbers do not match, and the routine goes to the next step S10.

In this step S10, a check is made to see if the identification number matches the identification number of another nonvolatile memory (that is, nonvolatile memory B) stored in the ROM3.

If the identification numbers do not match in the check in S10, it is determined that the non-volatile memory B erroneously connected to the connector α is abnormal, and the non-volatile memory B is connected to indicate the connection location (connector α) of the non-volatile memory B. Is displayed on the display unit 6, for example, as an abnormality of the sex memory A (S14).

Also, if the identification numbers match in the above check of S10,
It is determined that the non-volatile memory B is erroneously connected to the connector α, and the routine goes to the next step S11.

Furthermore, the identification number storage area A ₁ and the check data storage area A ₂ in the stored identification number and the check data in the nonvolatile memory A that wrong connectors β is connected this step S11, the non-volatile memory B is CPU2 And the process proceeds to the next step S12.

In this step S12, the read identification number ROM3
It is determined whether or not it matches the identification number of the non-volatile memory A stored in the non-volatile memory A.

If the identification numbers do not match in the check in S12 above,
It is determined that the non-volatile memory A is erroneously connected to the connector β, and an error of the non-volatile memory B is displayed on the display unit 6 to indicate the connection location (connector β) of the non-volatile memory A, for example. (S15).

If the identification numbers match in the check in S12, it is determined that the nonvolatile memory A is erroneously connected to the connector β, and the routine goes to the next step S13.

In this step S13, for example, the display unit 6 displays that the nonvolatile memory B is connected to the connector α of the nonvolatile memory A and the nonvolatile memory A is connected to the connector β of the nonvolatile memory B by mistake.

Therefore, it is possible to easily detect a difference in insertion of a plurality of nonvolatile memories.

An example of a wrong insertion determination unit is a unit that realizes a function of checking a match with an identification number of another nonvolatile memory when the above-described series of (S3, S10, S11, S12) identification number checks are abnormal. It is.

When it is determined in S13 that the connection between the nonvolatile memories A and B is incorrect, the nonvolatile memory A and B are further determined in the next step S16.
The storage data of A and B may be exchanged by the CPU 2.

In this case, it is possible to further save the trouble of switching between the two memories in order to correct a wrong insertion of the non-volatile memory.

However, it is assumed that the nonvolatile memory in this case is of a rewritable type constituted by, for example, a RAM with a built-in battery.

When it is determined that the insertion is wrong in S13 described above,
Means for realizing the function of exchanging data stored in the nonvolatile memory is an example of the exchanging means.

In the above embodiment, the case of two nonvolatile memories A and B has been described. However, the same processing is performed when the number of nonvolatile memories is another number (for example, three or four). be able to.

〔The invention's effect〕

In a control device including a plurality of nonvolatile memories according to the first invention, an identification number storage area provided in each of the nonvolatile memory areas for storing an identification number, and each of the nonvolatile memory areas And a check data storage area for storing the check data of the nonvolatile memory, and the identification data storage area of the nonvolatile memory after the nonvolatile memory is connected to the control device. Identification number checking means for reading and checking an identification number; and data check for reading and checking check data stored in the check data recording area of the nonvolatile memory after the nonvolatile memory is connected to the control device. Means and the checks by the identification number checking means and the data checking means are both normal. If a determination means for non-volatile memory and its connection the each is determined to be normal,
If the check by the identification number check means is abnormal, a control device is provided which comprises a wrong insertion judgment means for checking the coincidence with an identification number of another nonvolatile memory. .

Therefore, it is possible to easily detect both a defect and a wrong insertion of a plurality of nonvolatile memories.

Further, according to a second aspect of the present invention, there is provided a control device characterized by further comprising a switching means for replacing data stored in the nonvolatile memory when the insertion is judged to be wrong by the wrong insertion judging means.

Therefore, the labor for replacing the non-volatile memory is further reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control device according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing a storage area of a nonvolatile memory of the control device, and FIG. 3 is a check of the nonvolatile memory of the control device. It is a flowchart which shows a process. [Description of Signs] 1 ... Control device 2 ... Microcomputer 3 ... ROM 4 ... Input unit 5 ... Output unit 6 ... Display unit A, B ... Non-volatile memory A ₁ , B ₁ ... Identification Number storage area A ₂ , B ₂ …… Check data storage area

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 12/16 G06F 12/06 G11C 5/00

Claims (2)

(57) [Claims] 1. A control device comprising a plurality of nonvolatile memories, an identification number storage area provided in each of the nonvolatile memory areas for storing an identification number, and each of the nonvolatile memory areas And a check data storage area for storing the check data of the nonvolatile memory, the check data being stored in the identification number storage area of the nonvolatile memory after the nonvolatile memory is connected to the control device. An identification number checking means for reading and checking an identification number; and a data check for reading and checking check data stored in the check data storage area of the nonvolatile memory after the nonvolatile memory is connected to the control device. Means and the checks by the identification number checking means and the data checking means are both normal. A determination unit for determining that each of the nonvolatile memories and the connection thereof are normal; and, when the check by the identification number check unit is abnormal, matching with the identification numbers of the other nonvolatile memories. A control device comprising: a wrong insertion judgment unit for checking. 2. A control device comprising a plurality of nonvolatile memories, comprising: an identification number storage area provided in each of the nonvolatile memory areas for storing an identification number; and each of the nonvolatile memory areas. And a check data storage area for storing the check data of the nonvolatile memory, the check data being stored in the identification number storage area of the nonvolatile memory after the nonvolatile memory is connected to the control device. An identification number checking means for reading and checking an identification number; and a data check for reading and checking check data stored in the check data storage area of the nonvolatile memory after the nonvolatile memory is connected to the control device. Means and the checks by the identification number checking means and the data checking means are both normal. A determination unit for determining that each of the nonvolatile memories and the connection thereof are normal; and, when the check by the identification number check unit is abnormal, matching with the identification numbers of the other nonvolatile memories. A control device comprising: a wrong insertion judgment unit for checking; and a replacement unit for replacing data stored in a non-volatile memory when the wrong insertion is judged by the wrong insertion judgment unit.