JPH096419A - Program generator - Google Patents

Abstract

PURPOSE: To simplify the program input operation conducted on an instruction basis by conducting the storage of an optional process number to a process number memory, the read of the storage content and its update based on an input operation of a program to simplify the key input operation for the same process number. CONSTITUTION: A process number is read from a process number memory 44 storing the process number corresponding to the number designated by a numeral key and the process number used at present or a process number to which a prescribed number (e.g. 1) is added is handled as a process operation start instruction or a process number attended to a process drive instruction and the content of the process number memory 44 is renewed corresponding to the read of the process number memory 44. When the process number is set newly, the numeral key is used to write the number to the process number memory 44 and then the stored process number is read and programmed while being renewed. Thus, it is not required to make programming for each process number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the operation of a large number of input signals.
The present invention relates to a program creating device for a so-called programmable controller (hereinafter referred to as PCL) that responds to an N / OFF state and performs ON / OFF control of a large number of output signals by programmable electronic means, and generally relates to an SFC (Sequential Function). Chart) is a process that facilitates the creation of a stepwise program.

[0002]

2. Description of the Related Art FIG. 7 exemplifies what is called a selective branch in a generally known SFC diagram. In the figure, 1 is an initial step S0 that is activated when the power of the PLC is turned on and has a step number S0. 2 is an input X0 of the PLC is ON.
Transition conditions X0 and 3 that become conductive when are input to PLC X4
The transition condition (X4 bar) 4 that conducts when is OFF is activated when the initial process 1 is active and both transition condition 2 and transition condition 3 are conductive, and at the same time, the initial process 1 is inactive. In steps S10 and 5, the output Y0 and 6 of the PLC that operates when step 4 is active are conductive when the input X1 of the PLC is ON. Transition conditions X1 and 7 are that transition step 6 is active and transition condition 6 is The outputs S1 and S8 of the PLC that are activated when the process 4 is inactive and are activated when the process 4 is inactive at the same time as the outputs Y1 and 9 of the PLC
Transition condition X2, 10 that conducts when input X2 of is ON
Is activated when the step 7 is active and the transition condition 9 is conductive, and at the same time, the step S12 is inactive,
11 is the output Y2 of the PLC that operates when step 10 is active, and 12 is the transition condition X3 that conducts when the input X3 of the PLC is ON.

Reference numeral 13 is a transition condition X4 which conducts when the input X4 of the PLC is ON, and reference numeral 14 is an input X0 of the PLC is OFF.
The transition condition (X0 bar) that conducts when is, step 15 is activated when the initial step 1 is active and both transition conditions 13 and 14 are conductive, and at the same time, the initial step 1 is inactive. S20 and 16 are output Y3 of the PLC that operates when the step 15 is active. 17 is input X of the PLC.
Transition conditions X5 and 18 that are conducted when 5 is ON are activated when the above step 15 is active and transition condition 17 is conducted, and at the same time, step 15 is inactive.
9 is the output Y4 of the PLC which operates when the step 18 is active, 20 is the transition condition X6 which is conductive when the input X6 of the PLC is ON, 21 is the transition condition X7 which is conductive when the input X7 of the PLC is ON , 22 are activated when the process 10 is active and the transition condition 12 is conductive, or when the process 18 is active and the transition condition 20 or the transition condition 21 is conductive, and at the same time, the transfer source process 10 or process is performed. 18
Steps S22 and S23 in which is inactive are PLC inputs X10
Driving condition X10, 24 which is conducted when is ON is step 2
P that operates under drive condition 23 when 2 is active
The outputs Y5 and 25 of the LC are transition conditions X11 that conduct when the input X11 of the PLC is ON, and are transition conditions to the process connected to the next stage.

In the SFC diagram constructed as described above, when the power of the PLC is turned on, step 1 is active, and when either transition condition 2 or transition condition 13 is conductive, step 4 or step 15 is activated. , The output 5 or the output 16 operates, and the initial process 1 of the transfer source becomes inactive. Here, for example, if only the transition condition 2 is conducted and the step 4 is active, the output 5 operates, and if this (output 5) is the right-hand motor, the input X1 as the right limit switch is set as the transition condition 6. In other words, when the right limit is reached, step 7 becomes active and step 4 becomes inactive. As a result, the rightward motor is stopped, and the work at the right limit position is started by the output 8 in the next step 7. Further, for example, if the input X2 as the work completion signal at the right limit position is set as the transition condition 9, when the work ends at the right limit position, the process 10 becomes active and the process 7 becomes inactive. Thus, if the output 11 of step 10 is a left-handed motor and the input X3 as a left limit switch is set as the transition condition 12, step 22 becomes active and step 10 becomes inactive when the left limit is reached. As a result, the leftward motor is stopped.

On the other hand, only the transition condition 13 becomes conductive and the process 15
If is active, output 16 is active, for example this (output 1
If 5) is a rising motor, if the input X5 as the upper limit switch is set as the transition condition 17, the step 18 becomes active and the step 15 becomes inactive when the upper limit is reached. As a result, for example, the raising motor is stopped and the next step 18
Other operations are started by the output 19 of. If, for example, the output 19 is a descending motor, if the input X6 as the origin limit switch is set as the transition condition 20 and the input X7 as the manual stop switch is set as the transition condition 21, either the arrival at the origin or the manual stop signal is determined. As a result, step 22 becomes active and step 18 becomes inactive. As a result, the descending motor is stopped.

When the transition condition 12, the transition condition 20 or the transition condition 21 becomes conductive at the end of the above-mentioned two kinds of process sequences, the process 22 becomes active and the respective transfer source processes become inactive. Thus, if the output 24 of the step 22 is, for example, a carry motor, the input X10 as the carry start switch is set as the driving condition 23, and the input X11 as the carry position limit switch is set as the transition condition 25. 22 becomes inactive and shifts to the next step.

FIG. 8 shows a list of key operations when programming the SFC diagram of FIG. 7 using a conventional program creating device. In the figure, 26 is an operation key corresponding to the process operation start command STL, 27 is an operation key for the symbol S corresponding to the process number, 28 is a numerical key for inputting the process number, and generally 0 to 10
A numeric key corresponding to the decimal value is prepared. Reference numeral 29 is an execution key for enabling the STL_S0 instruction, for example. The following steps are sequentially programmed in the same manner, but 30 is a normally open contact command LD for starting the transition condition, 31 is a serial normally closed contact command ANI for the transition condition, 32 is a process drive command SET, 33 is an output command OUT, and 34 is a transition condition. Parallel normally open contact command O
R and 35 are operation keys for the symbol X corresponding to the input of the PLC, and 36 is an operation key for the symbol Y corresponding to the output of the PLC, and the contact instructions LD30 and ANI.
31 and OR34 are programmed before the process drive command SET32, and function as a transition condition in combination with the process start command STL26. Such a determination is executed on the PLC side by the system memory in the PLC. Note that 37a to 37d indicate that the same number is repeatedly input to the process number of the process drive command SET and the process number of the process operation start command STL.

[0008]

As described above, in the conventional program creating apparatus, for one process, a coil command element for driving the process according to the transition condition from above and a process for driving the load are processed. Since a contact element is required, it is necessary to set a duplicate process number in the process number of the process drive command SET which is a coil command and the process number of the process operation start command STL which is a contact command, resulting in poor program work efficiency. There is a problem. In order to cope with this, it is also possible to draw an SFC diagram on a large screen and automatically number process numbers on this screen, but in this case, the problem that the program creation device becomes large and expensive is there.

The present invention has been made in order to solve the above problems. By executing an instruction-based program, a small and inexpensive program creating apparatus can be used, and a program with duplicated process numbers can be simplified. The first purpose is to realize. Moreover, additional process,
The second step is to use any process number that can be used for deletion and the like, and to be able to program freely even if there is a skip number.

[0010]

According to a first aspect of the present invention, there is provided a program creating apparatus including an operation key (STL) corresponding to a process operation start command and an operation key (L) corresponding to a process shift command.
D, ANI), an operation key (SET) corresponding to a process drive command that works with process transition to inactivate the current process and activate the next process, and is associated with the process operation start command and the process drive command. Numerical key (S0-
9), a process number memory in which the process number corresponding to the number designated by the numerical key is stored and the stored contents are updated in response to the reading, and the contents of the process number memory are read and the corresponding process number is set. It is equipped with a process number read key (NEXT, AGAIN) to be handled as a process number associated with a process operation start command or process drive command, and transfers commands for a series of processes designated by the operation keys to the program memory of the programmable controller. is there.

According to the second aspect of the present invention, there are two types of process number reading keys: an AGAIN key for reading the same number stored in the process number memory and a NEXT key for reading a number obtained by adding a predetermined value (eg, 1) to the AGAIN key. It is characterized by having.

The process number read key according to the third aspect of the invention is to read the same number stored in the process number memory,
Alternatively, it is provided with two kinds of functions for reading a number obtained by adding a predetermined value (for example, 1) thereto.

According to a fourth aspect of the invention, the process drive instruction (SE
T) and the process operation start command (STL) are successively specified, and the same process number or process number read key is subsequently specified, the process drive command and the process operation start command are automatically given the same number. The process number of is attached.

[0014]

In the program creating apparatus according to the present invention, the process number is read from the process number memory storing the process number corresponding to the number designated by the numerical key, and the process currently used. The process number added with a number or a predetermined value (for example, 1) is treated as a process number associated with a process operation start command or a process drive command, and the contents of the process number memory are updated corresponding to the reading of this process number memory. To be done. With this, when a new process number is set, the number is written in the process number memory with the numeric keys, and then the stored process number is read out and the program can be executed while updating, so that the program of each process number can be programmed. You don't have to.

[0015]

【Example】

Embodiment 1 FIG. [Description of Device Configuration of FIG. 1] FIG. 1 is a block diagram showing a configuration of a programmable controller (PLC) and a program creating device according to the present invention for the PLC. In the figure, 40 is a program creating device housed in one housing, 41 is a first microprocessor that operates according to a procedure defined by a program in the system memory 42, and 43 is a program creating operation from the operation keys 45 or A sequence program memory in which a sequence program obtained from a programmable controller 50 connected from a communication I / F (interface) 49 via a cable 60 is written, and 44 is a step of storing a process number as a means for realizing the present invention. A number memory, 45 is the first microprocessor 4 via the key I / F 46
Operation keys such as a sequence command word key and a numerical value key connected to 1;
The display device 49 displays the display data sent from the microprocessor 41, and 49 is an external communication I / F. The system memory 42, the sequence program memory 43, the process number memory 44, the key I / F 46, the screen controller 48, and the communication I / F 49 are bus-connected to the first microprocessor 41, and the program creating device 40 as a whole. Make up.

Reference numeral 50 is a programmable controller (PLC) housed in one housing, 51 is a second microprocessor operating in a procedure defined by a program in the system memory 52, and 53 is a sequence control by the program input device 40. Sequence program memory in which the contents of is written, 54 is ON / OFF of PLC input / output
Information is stored and a device memory that constitutes a timer, counter, data register, etc., 55 is an input I / O
A large number of input signal switches connected to the second microprocessor 51 through F56, and 57 for an output I / F5
A large number of output loads connected to the second microprocessor 51 via 8 and a communication I / F of PLC 50 serially connected to a communication I / F 49 of the program input device 40 via a cable 60. is there. The various memories and interface circuits are bus-connected to the second microprocessor 51, and the PLC 5 as a whole is connected.
Configure 0.

[Operation of Device of FIG. 1] In the device of FIG. 1 configured as described above, a large number of input signal switches 55 are provided.
ON / OFF information is stored in the device memory 54 via the input I / F 56 and the second microprocessor 51. The large number of external output loads 57 are controlled by the second microprocessor 51 based on the contents of the sequence program memory 53 and the contents of the device memory 54, and are ON / OFF controlled via the output I / F 58. On the other hand, the sequence command input by the operation key 45 of the program creating device 40 is calculated by the first microprocessor 41 through the key I / F 46 according to the procedure determined by the key input processing program in the system memory 42. It is displayed on the display 47 via the screen controller 48. Further, the calculation result of the first microprocessor 41 is written in the sequence program memory 43, or
Alternatively, the cable 60 connected to the communication I / F 49 operates the second microprocessor 51 via the communication I / F 59 of the PCL 50 according to the procedure defined by the communication program in the system memory 52, and writes the sequence program memory 53. . Process number memory 44
Stores the process number defined in the process number automatic shift program in the system memory 42, and reads the "process operation start command key" or the "process drive command key" and the "process number read" provided as means for realizing the present invention. The process number used in the sequence program is read while the stored contents are updated by the combination of "keys".

[Description of Configuration of FIG. 2] FIG. 2 is an external view showing an example of the program creating apparatus 40 shown in FIG.
This program creation device 40 includes a cable 60 for connecting the programmable controller 50 shown in FIG.
And a display 47 for displaying the sequence program
And an operation key 45 for inputting a sequence command. The operation key 45 is a process number (symbol S).
Operation key 27, numeric key 28, execution key 2 corresponding to
9, normally open contact command LD key 30, series normally closed contact command AN
I key 31, process drive command SET key 32, output command O
A UT key 33, a parallel normally open contact instruction OR key 34, an operation key 35 corresponding to an input (symbol X), an operation key 36 corresponding to an output (symbol Y), and a process number read key 63 used as an example in the present invention. (NEXT) and a process number read key 64 (AGAIN).

In the program creating apparatus 40 configured as described above, the operation of entering a program is performed by the operation key 4
The various keys prepared in 5 are sequentially input based on the sequence program list, and finally, the execution key 29 is used to confirm.

[Explanation of Key Operation List of FIG. 3] FIG. 3 shows the key operation list of the conventional program creating apparatus shown in FIG. 8 as a function of the process number memory 44 shown in FIG. 1 as a means for realizing the present invention. It is an example of a key operation list when inputting using. In FIG. 3, the NEXT key 63
Is an example of a key for reading the process number of the process drive command from the process number memory 44 shown in FIG. 1 and updating the process number, A
The GAIN key 64 indicates the process number of the process operation start command as shown in FIG.
An example of a key read from the process number memory 44 shown in FIG. 3, an operation 65 is an example of a key input operation using the NEXT key 63, and is SET_NEXT_execution, and an operation 66 is AGAI.
An example of key input operation using the N key 64 is STL_AG
AIN_execution.

The list shown in FIG. 3 is input using the program input device 40 shown in FIG.
NEXT key 63 used for NEXT_execution 65, and S
The AGAIN 64 key used for TL_AGAIN_execution 66 is the operation key 4 of the program creation device 40 shown in FIG.
5 is provided.

Comparing the lists of FIG. 3 and FIG. 8, the repetitive input portions 37a to 37d designated in FIG. 8 are simplified by the NEXT key 63 and the AGAIN key 65 in FIG. 3, and the input operation is simplified. .

[Explanation of Flowchart of FIG. 4] FIG.
The program operation device 4 shown in FIG. 2 for the key operation shown in FIG.
0, the system memory 42 shown in FIG.
5 is a flowchart explaining how the process number automatic transfer program in FIG. In FIG. 4, step 70 is a step of determining the input of a process drive command (SET) and a process number read command (NEXT).
Step 71 is a step that is executed when the determination condition and the input condition of step 70 match, the process number memory is read, and the value obtained by adding 1 is set as the process number of the process drive instruction, and the process number memory is updated. Step 72 is a step of determining the process drive instruction (SET) and input of an arbitrary process number (SXXX) when the determination condition of step 70 and the input instruction do not match. Step 73 is Step 72
In the step executed when the judgment condition and the input condition of are matched, the process drive command (S
ET) as the process number and the process number memory is updated. Step 74 is a step of determining the input of the process operation start command (STL) and the process number read command (AGAIN) when the determination condition of step 72 and the input condition do not match. Step 75 is a step that is executed when the determination condition of step 74 and the input command match, and the process number memory is read and the read content is the process number of the process operation start command. In step 76, if the determination condition of step 74 and the input command do not match, the process operation start command (ST
L) and an arbitrary process number input (SXXX). Step 77 is a step that is executed when the judgment conditions of step 76 and the input command match, and the process operation start command (ST
L), and the process number memory is updated. Then, step 78 is a step of determining the operation for confirming the processing content.

In the flowchart constructed as shown in FIG. 4, when SET_NEXT is input at step 70, the process number memory 44 shown in FIG.
Is read and the value obtained by adding 1 to this is set as the step number of the step driving instruction, and then the step number memory 44 is updated to the added number. In step 72, SET_S
When an arbitrary step number is input by the XXX instruction, the step number SXXX input in step 73 is used as the step number of the step driving instruction, and subsequently the step number memory 44 is updated to that number. When STL_AGAIN is input in step 74, the contents of the process number memory 44 are read in step 75, and this is used as the process number of the process operation start command. In step 76, when an arbitrary process number is input by the STL_SXXX instruction, the process number SXXX input in step 77 is used as the process number of the process operation start instruction,
Then, the process number memory 44 is updated to that number. Step 78 is Step 71, Step 73, Step 77
Of the number of the assigned process number and the process of arbitrarily inputting the process number, and the re-input operation is determined.

As described above, according to the first embodiment, the process drive command (SET) or the process operation start command (STL) is executed.
By the combination of the command keys following, the process number memory 44 shown in FIG. 1 can store an arbitrary process number, read the stored contents, and automatically update the stored contents.

Example 2. FIG. 5 shows an example of the key operation list of FIG. 3 shown in the first embodiment, as well as the operation of updating the process number of the process drive command and reading the process number of the process operation start command.
It is an example of a key operation simplified into a continuous command. In FIG. 5, 67 is a process drive command (SET), a process operation start command (STL), and a process number read command (NEXT),
SET_STL_N, which is an example of key operations that are specified consecutively
EXT_execution. This is the SET key 32, the STL key 23, which is provided in the program input device 40 shown in FIG.
The NEXT key and the execution key are continuously operated, and this SET_STL_NEXT_execution is executed in the first embodiment.
4 is added to FIG. 4 showing the operation procedure of FIG.

FIG. 6 illustrates how the process number automatic transfer program in the system memory 42 shown in FIG. 1 operates when the key operation shown in FIG. 5 is performed by the program input device 40 shown in FIG. It is a flow chart. This flowchart is obtained by adding step 78, step 79, and step 80 to step 76 of FIG. 4 shown in the first embodiment. In FIG. 6, in step 78, if the determination condition of step 76 and the input command do not match, the process drive command SET and the process operation start command STL are executed.
And a process number read command NEXT is a step of determining that the process numbers are continuously input. Step 79 is a step executed for the process drive command when the determination condition of step 78 and the input command match. Step 8
0 is the process following step 79 when the determination condition of step 78 and the input command match, and is the step executed in response to the process operation start command.

In the flowchart of FIG. 6, when the SET_STL_NEXT instruction is input in step 78, the step number memory 44 shown in FIG.
Is read, and the value obtained by adding 1 to this is set as the process number of the process drive command SET, and then the process number memory 44 is updated. Further, in step 80, the contents of the process number memory 44 are read, and the read memory contents are used as the process number of the process operation start command STL.

As described above, according to the second embodiment, in addition to the first embodiment that functions by the combination of the process drive command SET or the process operation start command STL followed by the process number read command key, the process drive command SET and the process operation start are performed. Command ST
By permitting the continuous use of L and the process number read command NEXT, the process drive command, the process operation start command and the process number input operation can be collectively performed.

Example 3. In the key operation list shown in FIG. 3 of the first embodiment, the process number of the process drive command is read,
SET_NEXT_execute 6 which is an example of a key to be updated
5 or NE in the STL_AGAIN_execution 66, which is an example of a key for reading out the process number of the process operation start instruction.
Two types of keys, XT key 63 or AGAIN key 64, are used, but the input command is an operation for reading and updating the process number of the process drive command, or an operation for reading the process number of the process operation command. Is determined by whether the key is input in combination with the SET key 32 or the STL key 26. For example, STL_NEXT is STL_NEXT.
If it is defined as having the same function as AGAIN, it is not always necessary to provide two types of keys, and SET_NE
NEXT key 63 like XT or STL_NEXT
It can be realized by only the operation.

Example 4. In the configuration diagram of the first embodiment shown in FIG. 1, a communication interface 4 included in each of the program creation device 40 and the programmable controller 50.
9 and the communication I / F 59 are connected by a cable 60. This is because the device has an independent housing structure, and this is configured in the same housing. The program creation device 40 or the programmable controller 50 having the above structure and directly connected without an interface circuit may be used.

Example 5. In the first embodiment,
The update unit of the process number memory 44 shown in FIG. 1 does not have to be the update of one unit, and may be another numerical unit or may be arbitrarily set.

[0033]

According to the inventions of claims 1 to 4, storage of an arbitrary process number in the process number memory, reading of the stored content, and updating of the stored content are performed on the input operation of the program. Therefore, the key input operation of the same process number repeated in the sequence program in which the process drive command and the process operation start command are continuous can be simplified, and the program input operation performed on the command basis can be simplified. In addition, the input operation when handling consecutive process numbers can be simplified, and it has the degree of freedom to handle arbitrary jump numbers.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a program creation device and a programmable controller according to a first embodiment of the present invention.

FIG. 2 is an external view of a program creation device according to the above embodiment.

FIG. 3 is a key operation list in the above embodiment.

FIG. 4 is a flowchart of a process number automatic transfer program according to the above embodiment.

FIG. 5 is a key operation list according to the second embodiment.

FIG. 6 is a flowchart of a process number automatic transfer program according to a second embodiment.

FIG. 7 is an example of a conventional SFC diagram.

FIG. 8 is a key operation list by a conventional program creation device.

[Explanation of symbols]

26 process operation start command key (STL), 28 numeric key, 30 process shift command key (LD), 31 process shift command key (ANI), 32 process drive command key (SE
T), 40 program creation device, 43 program memory, 44 process number memory, 45 operation keys, 50
Programmable controller, 63 process number read key (NEXT), 64 process number read key (AG
AIN).

Claims (4)

[Claims] 1. A process controller, which responds to ON / OFF states of a large number of input signals and controls ON / OFF of a large number of output signals by programmable electronic means, wherein the process operation start An operation key corresponding to a command, an operation key corresponding to a process shift command, an operation key corresponding to a process drive command that works with process shift to inactivate the current process and activate the next process, start of the above process operation A command and a numerical key for instructing a process number associated with the process driving command, a process number corresponding to the number designated by the numerical key, and a process number memory for updating the stored contents in response to the reading. A process for reading the contents of the process number memory and treating the corresponding process number as the process number associated with the process operation start command or process drive command. Comprising a number reading key, program creating device commands for a series of steps that have been input by the operation key, characterized in that transferred to the program memory of the programmable controller. 2. The process number read key includes two kinds of read keys for reading the same number stored in the process number memory or for reading a number obtained by adding a predetermined value thereto. Item 1. The program creation device according to item 1. 3. The process number reading key has two kinds of functions of reading the same number stored in the process number memory or reading a number obtained by adding a predetermined value thereto. Item 1. The program creation device according to item 1. 4. When the process drive command and the process operation start command are successively specified and then the same process number or the process number read key is specified, the process drive command and the process are automatically performed. 4. The program creating apparatus according to claim 1, wherein each operation start command is associated with a process number of the same number.