JPH03164846A - Control and monitor device - Google Patents

Abstract

PURPOSE:To easily change processing contents by writing data in an EEPROM of a control and monitor device from an external device. CONSTITUTION:When data is sent from a personal computer 7, a control and monitor device 1 receives this data by a communication port 5 to write data in a PROM 4. This, data is a data table indicating control items and monitor items. A CPU 2 reads in the data table written in the PROM 4 by the program written in a ROM 3 and performs the control and monitor processing. A commu nication line 6 may be detached when data write is completed, and the control and monitor device 1 is operated completely independently after one data write because data written in the PROM 4 is held regardless of cutting-off of power. Thus, different data is written to easily and freely change the operation of the control and monitor device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control and monitoring device, and more particularly to a control and monitoring device that performs monitoring and control processing in accordance with control and monitoring data.

[Conventional technology]

Conventionally, this type of control/monitoring device has been developed by creating software for control/monitoring processing, compiling, linking, and locating it, writing a program to ROM, and installing the ROM in the control/monitoring device. Monitoring and control operations were being performed.

[Problem to be solved by the invention]

The conventional control and monitoring devices described above have the disadvantage that the software must be modified every time there is a change in the control items or monitoring items in the supervisory control process, and there is a possibility that bugs may occur when the software is changed. , inspection after programming is essential. Also, every time there is a change, compile, link, locate, and write the ROM to 1RO.
A series of operations such as replacing the M were required, which required a lot of effort.

[Means to solve the problem]

The control and monitoring device of the present invention includes a communication port that receives data indicating control items and monitoring items from an external device via a communication line, and stores the received data so that the stored data is saved even when power supply is stopped. The computer has a ROM, and a CPU that performs monitoring control processing according to data stored in the ROM.

〔Example〕

Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention.

The control and monitoring device 1 of this embodiment includes a communication port 5 that receives data indicating control items and monitoring items from an external device of a personal computer (personal computer) 7 via a communication line 6.
and a ROM (or electrically erasable PR
The CPU 2 includes an EEPROM (OM=EEPROM) 4 and a CPU 2 that performs monitoring control processing using program data in the ROM 3 in accordance with data stored in the ROM 4.

Next, the operation will be explained.

The control and monitoring device 1 and the personal computer 7 are connected through a communication line 6. When data is sent from the personal computer 7, the control and monitoring device 1 receives this data through the communication port 5 and sends it to P.
Data is written to ROM4. This data is a data table showing control items and monitoring items. CPU2 reads PROM4 according to the program written in ROM3.
After the data writing is completed, the communication line 6 can be removed, and the data written in the PROM 4 is saved even when the power is turned off. Once the degree data is written, the control and monitoring device 1 will work completely independently.
Furthermore, by writing different data, the operation of the control and monitoring device can be easily and freely changed.

〔Effect of the invention〕

As explained above, the present invention allows processing contents to be easily changed by writing data from an external device to the EEPROM of a control/monitoring device.・Can provide interface functions.

Also, since the CPU program of the control and monitoring device is fixed,
Even if the data in EEFROM is rewritten, it does not affect the operation of the CPU.

Furthermore, since the control and monitoring device and the personal computer are connected through a communication line, it is also possible to change the processing content of the control and monitoring device at a remote location.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention. l...control monitoring device, 2...CPU, 3...R
OM, 4...ROM (EEPROM), 5...Communication port, 6...Communication line, 7...PC.

Claims (1)

[Scope of Claims] 1. A communication port that receives data indicating control items and monitoring items from an external device via a communication line, and stores the received data and stores the stored data even when power supply is stopped. A control and monitoring device comprising a ROM and a CPU that performs monitoring and control processing according to data stored in the ROM. 2. The control and monitoring device according to claim 1, wherein an electrically erasable PROM is used as the ROM.