JPH0150933B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to programmable equipment such as controllers and arithmetic units using microprocessors.

Recent processes require higher precision calculations and control than ever before in terms of energy conservation, resource conservation, and pollution prevention. For this reason, even in the field of process control, it is used as equipment such as controllers and computing units.
In place of the analog calculation method, a digital calculation method using a microprocessor has been put into practical use. Moreover, microprocessor-applied devices have the advantage of being able to execute various operations using a single piece of hardware using user programs. There are two ways to embed a user program: one is to write it directly into the device's memory, and the other is to use a dedicated programmer to write it into the user ROM (read-only memory) and mount it in the device. The latter is superior in terms of maintainability. Moreover, the user program written by a dedicated programmer is expressed in mnemonic codes similar to calculator function keys, so no knowledge of computer software is required; all you have to do is look at the instrumentation flowchart and key in using calculator-like operations. It can be created by The user program created by this programmer is an intermediate code for calling an arithmetic program, and the arithmetic program itself is stored in an arithmetic ROM installed in the main body of the device. For this reason, the functions of the device itself are limited by the built-in arithmetic program, making it difficult to respond to requests for increased functionality or changes in functionality, resulting in problems with versatility despite being programmable. Moreover, the maintenance of the calculation program is not easy, and the amount of memory used in the main body of the device increases.

The present invention is a programmable device in which a user's ROM in which a user program is written using a programmer is mounted on the main body of the device, and an arithmetic ROM storing an arithmetic program is provided on the programmer side, and the arithmetic program is stored together with the user program when creating the user's ROM. By writing to the user's ROM and using the calculation program stored in the user's ROM when the user's ROM is installed in the device, the versatility of the device is increased, and at the same time, maintenance of the calculation program is facilitated.
In addition, the amount of memory used in the device itself is reduced.

FIG. 1 is a block diagram showing one embodiment of the programmable device of the present invention. In the figure, 10 is the main body of the device, which includes a microprocessor (hereinafter referred to as CPU) 11 that performs digital calculations, etc., a system ROM 12 that stores system programs,
An interface 13 with a process I/O such as a detector that detects the process amount of the controlled object or an operating end that controls the controlled object, and a user's ROM 14 that stores a user program created for each job.
Socket 15 where user's ROM 14 is installed
and RAM used for calculations and temporary storage of data, etc.
(random access memory) 16, and a panel interface 19 with a front panel 17 and a side panel 18, which are connected by a data bus 20.

30 is a programmer, and a program ROM 31 stores a program for programming control.
, program keyboard 32, display 3
3. I/O interface 36 such as an operation mode changeover switch 34 and a ROM writer 35, and a RAM 3 for temporarily storing created user programs.
7 and an arithmetic unit that stores various arithmetic programs.
It has a ROM 38 and a socket 39 to which the calculation ROM 38 is attached, and these are connected to the data bus 4.
Connected with 0. The data bus 40 of the programmer 30 is detachably connected to the data bus 20 of the device body 10 through a connector 50.

In the present invention configured in this manner, all operations of the device body 10 and the programmer 30 are performed by the CPU 11.
This is done under the control of The contents of this control are defined in the system program stored in the system ROM 12, and when the power is turned on, the peripheral circuits are initialized for a certain period of time. Next CPU1
1 determines whether the programmer 30 is connected as shown in the flowchart of FIG.
When the programmer 30 is not connected, the execution mode is set to execute calculations according to the user program stored in the user ROM 14, and when the programmer 30 is connected, the operation mode changeover switch 34 of the programmer 30 A program mode for creating a program and a test run mode for testing the program are selected.

Now connect the programmer 30 to the device main body 10,
When the operation mode changeover switch 34 is set to the program side P, the program mode is entered. In the program mode, user programs and parameters are keyed in from the keyboard 32. The result of keying in the user program is converted into an intermediate code by the CPU 11 of the device main body 10 according to the programming program stored in the program ROM 31 and written to the user program area of the RAM 37, and the parameters are also changed to the parameters of the RAM 37. written to the area. When the programming work is completed and the operation mode selector switch 34 is set to the test run mode side T, the main body 10 of the device is set to the programmer 3
A test run mode is entered in which the user program stored in the RAM 37 of 0 is executed including process I/O operations. In the test run mode, the CPU 11 of the device main body 10 reads intermediate codes written in the RAM 37 of the programmer 30 in the order of step numbers of the user program according to the system program, and sequentially executes the corresponding calculation programs in the calculation ROM 38 of the programmer 30. do. Further, since the value being calculated is displayed on the display 33 of the programmer 30 during the test run mode, the quality of the program can be checked in a short time, and if there is any deficiency, the program mode can be immediately returned to correct it. If the function of the user program of RAM 37 is satisfied in this way,
Insert the user's ROM 14 into the ROM writer 35, and transfer the created user program and parameters to the RAM 37 as shown in Figure 3.
At the same time, the arithmetic program of the arithmetic ROM 38 is also written to the arithmetic program area of the user's ROM 14. When the written user's ROM 14 is installed in the socket 15 of the device main body 10 and the programmer 30 is disconnected, the device main body 10 operates in the execution mode, and the user program written in the user's ROM 14 is transferred to the arithmetic program in the user's ROM 14. Run using

At this time, in the instruction operation section of the front panel 17, for example, the indicators IM and OM display the measured value PV from the detector of the controlled object, the set value SV, and the output value MV to the operating end of the controlled object, and the set value is operated. button
Increase or decrease the SV value by pressing □△ or □▽ of SP, and press □M of operation mode specification pushbuttons □A, □M, □C and operate manual operation lever MR. The output value MV can be increased or decreased. Indicators IM and OM of the instruction operation section on the front panel 17
Display contents, set value operation button SP, manual operation lever MR, operation mode specification push buttons □A, □M, □C
The operating functions can be freely specified by the user program. Also, the fail lamp LP ₁ on the front panel 17 is
It lights up when the CPU does not operate normally due to a CPU error or program error, and the Alum lamp LP ₂ lights up when the input from the process I/O becomes abnormal. Furthermore, various parameters are selectively displayed on the display DL of the instruction operation section on the side panel 18 using the keyboard KY.

In this way, in the present invention, an arithmetic ROM storing an arithmetic program is provided on the programmer side,
When writing the user program to the user's ROM, the calculation program is also written at the same time, so in response to requests for increasing or changing the functions of the main unit, all you have to do is add or change the calculation program in the calculation ROM on the program side. good. In other words, the main body of the device can be standardized as a panel instrument, for example, which has an interface with process I/O and an instruction/operation section on the panel, and the user program and calculation program written in the user's ROM can be used to control the function of the instrument (for example, ratio controller, pulse controller, etc.). Width controllers, etc.) can also be freely realized, making it extremely versatile. In addition, function changes, improvements, and maintenance of calculation programs are performed by the programmer.
Since only the ROM needs to be changed and there is no need to change the program of the device itself, maintenance is easy, and the amount of memory used in the device itself can be reduced, reducing the cost of the device itself.

Furthermore, when writing an arithmetic program to the user ROM, instead of copying all the arithmetic programs, only the arithmetic programs actually used in the user program can be generated and copied, thereby reducing the memory required for the user's ROM. This can further improve memory usage efficiency.

In addition to creating a program in the program mode, the programmer 30 has a function to transfer the user program in the user's ROM 14 of the device main body 10 to the RAM 37 of the programmer 30 by commands from a dedicated key, and a function to transfer the user's program in the user's ROM 14 set in the programmer 30 to the RAM 37 of the programmer 30. Function to copy contents to RAM37,
By providing an editing function for adding and deleting programs in the RAM 37 at any step, programming can be performed easily and safely. Furthermore, in the above example, a dedicated programmer that is connected to the main body of the device with a connector and performs programming using the CPU of the main body of the device is used as the programmer.
Various programmers can be used as needed, such as one that performs programming by itself without being connected to the main body of the device. Furthermore, as a method for copying a program created by a programmer to the user's ROM, in addition to the above-described method of directly copying the program using the programmer, it may be possible to copy the program using an intermediate medium such as a paper tape or a magnetic card.

As described above, according to the present invention, a programmable device can be obtained that has high versatility in its main body, allows easy maintenance of programs, and can reduce the amount of memory used in the device main body.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the programmable device of the present invention, and FIGS. 2 and 3 are diagrams explaining its operation. 10...Device body, 11...Microprocessor (CPU), 12...System ROM, 13...I/O interface, 14...User ROM, 15...Socket, 16...RAM, 20...Data bus, 30...
Programmer, 31...Program ROM, 32...Keyboard, 33...Display, 34...Mode specification switch, 35...ROM writer, 36...I/O
Interface, 37...RAM, 38...Operation
ROM.

Claims (1)

[Claims] 1 In a programmable device in which a user's ROM in which a user program is written using a programmer is mounted on the device body, an arithmetic ROM storing an arithmetic program is provided on the programmer side, and the arithmetic program is stored in the user's ROM along with the user's program when creating the user's ROM. A programmable device characterized by writing in a ROM and using an arithmetic program in the user's ROM when the user's ROM is mounted on the device body.