JPH0518121B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a control method for a general-purpose operation box that is connected to a programmable controller and that can be easily connected regardless of the type of equipment to which it is applied. Control devices such as relay panels and programmable controllers are used to control various equipment.
In some cases, a device (operation box) separate from such a control device is used to give commands and to notify the status of equipment, control status, etc. Such an operation box mainly consists of switches for giving commands and lamps for notification. One of these operation boxes
An example is shown in FIG. The general-purpose operation box 1 includes a function switch section 2 that shows functions common to all equipment, an up switch 31 and a down switch 32 that sequentially advance or reverse the display contents of process numbers and abnormal numbers, and change the status of each function. Each function section 3 includes a set switch 33 for performing the process, and a display 34 for displaying the process number, abnormality number, process name, and abnormality name for each function. During automatic operation of the equipment, process details are sequentially displayed on the display 34 according to the flow of each process. Further, when an abnormality occurs in the equipment, the abnormality code and abnormality name are displayed on the display 34, so that the details of the abnormality can be known at a glance. The connection between the general-purpose operation box 1 and a programmable controller (not shown) is such that digital signals are exchanged by serial transmission or the like, and the function switch section 2 of the general-purpose operation box 1
For connection between the switch and the control circuit in the controller, transmission lines are laid individually corresponding to the number of switches. Furthermore, signal lines for equipment control and lead-out lines from various switches that operate in conjunction with equipment operation are connected between the programmable controller and the equipment. Conventionally, in such a configuration, the following operations were required depending on the control details for each piece of equipment before the general-purpose operation box and the programmable controller were connected and put into operation. (1) It is necessary to assign each function to the internal relay section of the programmer controller. (2) It is necessary to have an allocation table of the information content to be mutually exchanged and the corresponding codes. (3) On the programmer controller side, it is necessary to add a sequence program to decipher and translate the received or transmitted code. To explain the above in detail, first, each function (for example, jig tightening, jig loosening, unit forward movement, unit backward movement, etc.) is selected according to the specifications of the equipment to be applied. Next, input/output parts (relays, limit switches, solenoid valves, lamps, etc.) are assigned to the internal relays of the programmable controller, and each function shown in Table 1 is assigned to each address of the internal relays of the programmable controller (set in the memory in the controller). Perform the task of assigning the

[Table] Furthermore, using Table 1, transmission codes, which are information for specifying the connection between the general-purpose operation box and the programmable controller, are assigned to each function. When the above work is completed, a program that embodies the sea case circuit diagram required for the programmable controller as shown in Figure 2 is written into the controller based on the operating conditions of the equipment to be applied (Figure 2 shows data C ₁ , C ₂ , Y ₂ as conditions PB1, M1~M5,
(obtained by a combination of C1 to C4, etc.)
Furthermore, sea case circuit diagrams such as those shown in FIGS. 3 and 4 necessary for connection with a general-purpose operation box are described. Here, FIG. 3 shows a circuit diagram of a decoding circuit provided in a control circuit section within the programmable controller. _R4 ～ _R8
We have prepared 256 systems in which the contacts of 8 relays are connected in series, corresponding to the number of data such as process order and equipment operation, and decode data D1 to D256 (up to 256 due to 8-bit processing). This is achieved by a combination of normally closed and normally open contacts. From the operation box 1, predetermined code numbers 01, 02, etc. are sent to the controller in response to the operation of each push button switch. Further, FIG. 4 shows an example of an encoding circuit for generating data Y2 and BCD data W1 to W8 to be sent to the general-purpose operation box 1. Data Y2 is under certain conditions (C4, C5, M2, M4, M5, etc.)
When all the signals are aligned, relay Y2 is activated, and W1 to W8 are encoded and sent out via the encoding circuit. Data Y2 in this case corresponds to code 01 (i.e. W8=
0, W7=0, W6=0, W5=0, W4=0, W3
= 0, W2 = 0, W1 = 1). Upon receiving this code, the general-purpose operation box 1 performs the necessary display. Programs that implement the sea case circuit diagrams as shown in FIGS. 3 and 4 are also subsequently written into the controller. The described address area in the memory is as shown in FIG. 5, and a general-purpose operation box connection program section is provided consecutively to the sequence program section. However, when connecting conventional general-purpose operation boxes,
As mentioned above, the work required to get it up and running is complicated,
It took a lot of time to work. An object of the present invention is to provide a control method for a general-purpose operation box that simplifies the procedure for connecting the general-purpose operation box to a programmable controller. In order to achieve the above object, the present invention sets up a relay area for information exchange in a general-purpose operation box and a programmable controller, and makes it possible to connect the two simply by assigning to this relay area. . FIG. 6 is a block diagram showing one embodiment of the present invention. Signals are exchanged between the control section of the general-purpose operation box 1 and the control section of the programmable controller 4.
This is carried out using a serial transmission method using a serial transmission line 5. (In addition, other transmission methods may be used instead of serial transmission.) On the general-purpose operation box 1 side, the serial transmission signal is transferred to the parallel signal ( For example, 8 bits) is converted into a serial signal and sent to the transmission line 5, or a serial signal from the transmission line 5 is converted to a parallel signal and sent to the system bus 12. The system bus includes a central processing unit (CPU) 13, a display controller (DSP) 14, a keyboard controller (KBC) 15, a read-only memory (ROM) 16, a random access memory (RAM) 17, and an internal relay area. are connected to each of the RAMs 18 in which the data is stored. The CPU 13 executes various calculations and controls according to programs stored in the ROM 16. The contents of the calculation and information from the control unit 4 are temporarily stored in the RAM 17. The RAM 17 also includes a backup memory that continues to store calculation contents, set values, etc. even when the power is turned off.
The DSP 14 has a character generator for displaying on the display 34, and has a function of displaying predetermined numbers and characters based on instructions from the CPU 13. The KBC 15 converts into a predetermined hexadecimal code when each of the switches 31, 32, and 33 provided in each functional unit 3 is operated.
It has a function to send data to the data bus. The RAM 18 corresponds to a plurality of relays n to (n+N), and each relay supports unit forward, unit backward,
Paired operations are possible so that the motor can be rotated in forward and reverse directions, such as tightening the jig and loosening the jig (each function is usually configured as a pair of forward and reverse operations).
That is, (n+2i) and (n+2i+1) form a pair,
For example, if relay n is for forward rotation of the motor, relay (n+1) is for reverse rotation. Furthermore, they are programmed to never turn on at the same time, and if they turn on at the same time, it is determined that there is an abnormality. The ROM 16 has a system program section that stores programs for basically controlling each functional section, and a data section that stores information such as process names that differ for each piece of equipment.
When using the operation box for other equipment, ROM1
By replacing only the contents of the data section in 6, the system can be operated without making any changes to the connection relationships. On the other hand, the control section on the programmable controller 4 side is composed of members with the same names except for DSP and KBC, and an I/O section 46, which converts parallel signals from the bus 42 into serial signals and sends them out to the general-purpose operation box 1. a direct/parallel signal converter 41 that converts the parallel signal into a parallel signal and sends it to the bus 42;
and a ROM 43 in which a program for basically controlling the controller is stored, and various calculations and controls are executed according to the program in the ROM based on information from the general-purpose operation box 1 and information from the equipment side. A program for controlling the CPU 44 and the equipment to be controlled is stored, and
The RAM 45 is equipped with a backup memory that temporarily stores the contents of calculations and set values by the CPU and does not lose its memory even when the power is turned off, and also sends control commands to the equipment and sends signals from sensors and switches from the equipment. Receiving input/output circuit 46
and a RAM 47 in which contents corresponding to the contents stored in the RAM 18 of the general-purpose operation box 1 are stored.
Each is connected to bus 42. An example of a map of the relay areas of the RAMs 47 and 18 is shown in FIG. In the above configuration, the general-purpose operation box 1 and the programmable controller 4 are connected by the transmission line 5, and the transmission code corresponding to the internal relay address shown in Table 2 is sent from the general-purpose operation box 1 to the transmission line 5. The data is transmitted to the programmable controller 4 via the programmable controller 4.

[Table] Therefore, when internal relay n is specified (ON) by operating the switch on general-purpose operation box 1,
The CPU 13 searches the corresponding RAM 18 for the code Cn corresponding to the transmission address n, and sends it to the transmission line 5 via the serial/parallel signal converter 11. The programmable controller 4 receives the transmission code Cn sent from the transmission line 5 through the serial/parallel signal converter 41, and based on the data, the CPU 44
An internal relay n in the RAM 47 is selected and turned on, and the result (n) is used in the program by a user program (sequence circuit diagram) to execute a necessary sequence. In this way, in the present invention, connections can be made simply by creating an assignment table as shown in Table 3, which associates each function with an internal relay, and moreover, the connection can be made using the general-purpose operation box connection program shown in FIGS. 4 and 5. can be made unnecessary.

[Table] As is clear from the above, according to the present invention, the general-purpose operation box can be connected to the programmable controller through a simple procedure.

[Brief explanation of the drawing]

Figure 1 is an external view showing an example of the appearance of a general-purpose operation box, Figure 2 is a circuit diagram of a sequence circuit that is the basis for programming conventional connection work procedures, and Figures 3 and 4 are conventional A circuit diagram of a sequence circuit required when connecting a general-purpose operation box to a programmable controller, FIG. 5 is an address map diagram in conventional program processing, FIG. 6 is a block diagram showing an embodiment of the present invention, and FIG. This figure is a map diagram of the relay area of the embodiment shown in FIG. 6. 1...General-purpose operation box, 2...Function switch section, 3
... Each functional unit, 4 ... Programmable controller, 5 ... Transmission line, 11, 41 ... Series/parallel signal converter (S/P), 12, 42 ... Bus, 13,
44... CPU, 14... Display controller (DSP), 15... Keyboard controller (KBC), 16, 18, 43, 47... Read only memory, 17, 45... RAM, 31, 3
2, 33...switch, 34...indicator.

Claims (1)

[Scope of Claims] 1. A memory that stores calculation and control programs executed within the device, a central processing unit that executes the calculation and control, a storage means that stores input information, and equipment operation. A general-purpose operation box and controller each equipped with a relay area for setting transmission codes necessary for sequence control, and outputting control commands for operating the equipment and displaying the operating status of the equipment. A method for controlling the operation of equipment by the general-purpose operation box and the controller connected to the general-purpose operation box and having a function of controlling the operation of the equipment based on the control command, the method comprising: Assigning an address map necessary for sequence control to the general-purpose operation box and the controller, instructing the general-purpose operation box to perform a program that selects a relay corresponding to the operation of the equipment of the equipment, and in the general-purpose operation box, An instruction signal is stored in the relay area, and a transmission code is retrieved by the central processing unit and the storage means and sent to the controller, and the controller stores the transmission code between the memory and the central processing unit. A method for controlling the operation of equipment, characterized in that the storage means converts it into the designated relay and reproduces it in the relay area, thereby turning on a relay corresponding to the operation of equipment of the equipment.