JP2012194678A - Control program development support device, program for supporting control program development, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control program development support device, even when a unit configuration is altered, dispensing work for changing a memory address in a control program, thereby improving convenience in the alteration of the unit configuration, and to provide a program for supporting a control program development, and a recording medium.SOLUTION: The control program development support device is configured to create an address table TB1 representing a correspondence between a memory address associated with a port ID and the port ID; create a variable table TB2 representing a correspondence between a variable Var associated with the port ID and the port ID; rewrite, for the address table TB1, the port ID in a unit before the alteration into a port ID in a unit after the alteration; acquire a port ID corresponding to the variable Var from the variable table TB2, and acquire the memory address corresponding to the acquired port ID from the address table TB1.

Description

  The present invention relates to a control program development support apparatus, and more particularly to a control program development support apparatus for creating a unit configuration for arranging a plurality of units connected to a CPU unit of a programmable controller in a plurality of slots in a rack, and a control. The present invention relates to a program development support program and a recording medium.

  A PLC (programmable controller) that controls an FA (factory automation) system installed in a production site of a production factory is generally a CPU (Central Processing Unit) unit that executes operations based on a control program (user program). On the other hand, an input unit that connects input devices such as sensors and switches and takes their on / off signals as input signals, and an output unit that connects output devices such as actuators and relays and sends output signals to them Various units such as a communication unit that connects to and exchanges information with a higher-level terminal device, a power supply unit that supplies power to each unit, etc. are connected, and these various units are arranged in a single or multi-stage rack, respectively. Configured.

  18 is a schematic configuration diagram of a programmable controller (PLC) 200 showing an example of a system configuration for connecting the CPU unit 22 and the various units 31, 32,...

  The PLC 200 includes a “CPU rack 00” including a power supply unit 21 and a CPU unit 22. In addition, an expansion rack (“Rack 01”, “Rack 02”,...) Including the power supply unit 21 may be added to the PLC 200.

  The “CPU rack 00” includes a plurality of units (component units such as a basic input unit, a basic output unit, a high function input unit, a high function output unit, and a CPU high function unit) in addition to the power supply unit 21 and the CPU unit 22. Is placed. Further, when racks are added, an I / O (input / output) control unit 40 is further arranged in the “CPU rack 00”, and an I / O interface is provided in the “rack 01”, “rack 02”,. A unit 50 and a plurality of units (component units such as a basic input unit, a basic output unit, a high-function input unit, a high-function output unit and a CPU high-function unit) are arranged, and an I / O control unit 40 and an I / O interface unit The units 50 are connected to each other via the wiring cable CB.

  In the example of FIG. 18, among the plurality of slots (slot 0, slot 1,...), The “CPU rack 00” has an input unit 31 in slot 0 and an output unit 32 in slot 1. Also, in “Rack 01”, among the slot 0, slot 1,..., The CPU high-function unit 33 is disposed in the slot 0, the input unit 34 is disposed in the slot 1, and the output unit 35 is disposed in the slot 2.

  Further, the input units 31 and 34 are provided with “input port 00”, “input port 01”, “input port 02”,... Corresponding to contacts of sensors, switches, and the like. Are provided with “output port 00”, “output port 01”, “output port 02”,.

  The CPU unit 22 includes a program memory 22a that stores a control program, a data memory 22b that stores an input signal captured by the input units 31 and 34, and an output signal that is a calculation result of the control program, and an operation based on the control program. And a processing processor unit 22c for processing and the like. Further, the PLC 200 is connected to a control program development support device 10 that acts as a programming tool device. The control program created and edited by the control program development support device 10 is further converted into an object code that can be executed by the CPU unit 22. Run the program.

  Specifically, the control program is described in a ladder language expressed by, for example, a ladder diagram (ladder chart) when the user (user) operates the control program development support device 10 before operating the PLC 200. Created.

  Then, the created control program is converted into an instruction word by the control program development support apparatus 10, and an operand corresponding to the CPU unit 22 is defined and downloaded to the CPU unit 22.

  The processor 22c of the CPU unit 22 sequentially reads out the instruction words of the control program from the program memory 22a and inputs from the data memory 22b based on the memory address of the memory M such as an I / O memory according to the operand of the read instruction word. Read the signal data. The read data is logically operated according to the control program, and the calculation result is stored in the data memory 22b. The stored calculation results are output to the output units 32 and 35 as output signals. The processing processor unit 22c of the CPU unit 22 cyclically executes an input signal read process, a control program execution process, and an output process output process.

  When the control program is created using a ladder language ladder diagram, a memory address in the memory M used in the CPU unit 22 for executing the control program is written on a symbol representing a contact on the control program. The contact points, for example, a target handled by the CPU unit 22 as I / O data (input data or output data of an I / O port), specifically, a contact point of a sensor or a switch. A symbol is an expression symbol indicating a contact on a control program written in a ladder language. For example, a symbol of an input contact is “−││−”, and a symbol of an output contact is “− ○ −”. (In the following description, symbols or contacts in the control program written in the ladder diagram may be referred to as “symbols / contacts” unless otherwise distinguished). For example, when the CPU unit 22 handles I / O data, the memory address is determined by allocating each I / O port corresponding to the contact to the memory, and each I / O data used by the CPU unit 22 for the calculation. Indicates the address number of the memory M in which is stored.

  The conventional control program development support apparatus 10 determines the memory address according to the arrangement position (slot mounting position) of slot 0, slot 1,... In the constituent units 31, 32,. Specifically, the memory of the memory M corresponding to “input port 00”, “input port 01”, “input port 02”,... In the input units 31 and 34 disposed (mounted) in the slot 0 and slot 1. The memory addresses of the memory M corresponding to “output port 00”, “output port 01”, “output port 02”,... In the output units 32 and 35 allocated (attached) to the slots 1 and 2 are assigned addresses. Are automatically assigned (see Patent Document 1).

  A procedure for automatically allocating the memory address of the memory M according to the arrangement position of the slot 0, the slot 1,... In the constituent units 31, 32,.

  FIG. 19 is a display screen showing a basic screen of the control program development support apparatus 10. FIG. 20 is a display screen showing an example of a ladder diagram created by the control program development support apparatus 10. FIG. 21 is a display screen showing an example of the unit configuration information screen.

  The control program development support apparatus 10 displays a basic screen as shown in FIG. 19 when a control program (for example, a ladder diagram in a ladder language) is created by a user program creation function (source code editor). In the basic screen, a screen for creating a control program is displayed in the right window W1, and a project selection screen W2 for project information relating to the unit configuration to be registered is displayed in the left window. The user creates a control program in the right window W1 using the source code editor (see FIG. 20).

  Next, when the user operates the pointing device 12b (see FIG. 18) on the basic display screen shown in FIG. 19 to select “unit configuration information” displayed in the tree on the project selection screen W2 by double-clicking or the like. The control program development support apparatus 10 displays the unit configuration information screen shown in FIG.

  In this example, since it is possible to cope with a system in which up to eight racks including “CPU rack 00” are connected in advance, “CPU rack 00”, “rack 01”, “rack 02” are displayed on the initial screen. , “Rack 03”,..., “Rack 07” are displayed in a tree shape as shown in the figure, and the unit configuration of each rack is displayed without being displayed.

  Before displaying the unit configuration information screen (see FIG. 21), the CPU unit 22 of “CPU rack 00” is registered. That is, the control program development support apparatus 10 displays a screen prompting the user whether or not to newly register the unit configuration on the dialog window screen. Then, the control program development support apparatus 10 receives an input for registration by a user operation, and then displays a screen (not shown) for selecting the type and model of the CPU unit 22 in the PLC 200, and selects the input. Prompt.

  Specifically, the control program development support apparatus 10 receives the input of the type and type information of the CPU unit 22 by a user operation. For example, when the CPU unit 22 of the type “CJ2H-CPU68-EIP” is selected by the user, the control program development support apparatus 10 registers the type of the target CPU unit 22 and the initial information of the unit configuration of the CPU rack. To do. The model of the CPU unit 22 registered in this way is displayed at the top of the tree display of the unit configuration information screen in FIG.

  Next, units (high function I / O unit, basic I / O unit) are registered in the unit configuration information screen.

  FIG. 22 is a display screen showing a state in which the rack item is opened on the unit configuration information screen shown in FIG.

  Specifically, when the rack item to be set is closed as in the initial screen, the [+] button displayed at the top of the tree display of the rack item to be used (set) is clicked. Then, an appropriate rack item is opened as shown in FIG. FIG. 22 shows a state in which “CPU rack 00” is opened. In the example of FIG. 22, up to 10 units (for the CPU rack, 10 units excluding the CPU unit) can be registered in each rack item. Initially, no CPU units 22 other than “CPU rack 00” are registered, and the tree display of each unit for 10 units is displayed as “free slot”. That is, a unit to be installed in a slot prepared in “CPU rack 00” (base unit) is not set.

  Next, a case where an actual unit registration process is performed will be described. FIG. 23 is an explanatory diagram of a screen showing an example of the unit list.

  When the unit is newly registered, the user operates the pointing device 12b (FIG. 18), selects the “free slot” field in the tree display shown in FIG. 22, and double-clicks the unit shown in FIG. The selection screen is displayed in a separate window.

  The control program development support device 10 displays a unit selection screen with reference to a unit information storage unit (not shown) that stores unit information about the unit. The unit information related to the unit stored in the unit information storage unit is specified by, for example, a list of unit types, types, and the like, functions for each unit, parameters to be set, and each type. Channel information about the unit and information for specifying the memory capacity.

  The unit selection screen shown in FIG. 23 displays target units constituting the PLC 200 in a tree structure for each type. For example, "Analog I / O unit", "Sensor unit", "Motion controller", "Position control unit", "Temperature control unit", "Basic I / O unit", "Communication unit", etc. Is done.

  When the control program development support apparatus 10 receives a click operation of the pointing device 12b by the user on “+” on the tree display screen, the control program development support apparatus 10 displays unit type information obtained by referring to the unit information storage unit. On the screen displayed in this way, the user searches for a unit to be used from the unit list, selects it, and registers it ("CJW-NC213" in the illustrated example).

  FIG. 24 is a display screen showing the unit configuration screen after executing the unit registration operation. FIG. 25 is a display screen showing an example of a unit addition screen.

  As shown in FIG. 24, when the unit has already been registered, the type of the set unit is displayed, and when it has not been registered, “empty slot” is displayed. In the case of a registered unit, the “model” information stored in the unit information storage unit is read and displayed. The specific name indicated by () after the model is displayed in the “model” column of the unit information storage unit.

  Furthermore, as shown in FIG. 24, when the selected unit is a high function I / O unit such as a position control unit, the unit addition screen shown in FIG. 25 is displayed and the unit number is registered. .

  Next, the model information definition file of the target unit is searched from the table, and the number of occupied channels, the number of input channels, and the number of output channels are acquired from the model information definition file. In the case of a high-function unit, necessary information is acquired by reading the model information definition file for the corresponding unit. In the case of a basic I / O unit, necessary information is obtained from the number of occupied channels and the input / output type.

  For example, in the case of a high-function unit, the head address is calculated from the unit number of the unit, and the input port address and output port address assigned to the high-function unit are calculated from the number of occupied channels, the number of input channels, and the number of output channels. . The calculation of the input / output address is performed as follows.

  That is, in this example, a memory area from the memory address “0000” channel of the memory M of the CPU unit 22 is prepared in the high-function unit, and a memory area for 10 channels is secured per unit (one occupied channel). is doing. Therefore, in the case of a high-function unit with a unit number of 00, the start address of the memory area used for the high-function unit in the memory M of the CPU unit is “0000” channel. Up to 0009 "channel is reserved. Similarly, in the case of a high-function unit with unit number 01, the start address of the high-function unit of the memory M of the CPU unit is “0010” channel, and the memory addresses from “0010” channel to “0019” channel are reserved. Is done. That is, if the unit number is N, the start address of the memory area allocated to the high-functional unit with the unit number N can be obtained by a simple expression such as “00 + 10 × N” channel. Further, the final address of the memory area allocated to the unit can be obtained based on the number of occupied channels.

  Further, in the case of a basic I / O unit, automatic memory allocation of input and output channel memory addresses by the control program development support apparatus 10 is performed according to the following rules. That is, the slot arrangement position of each unit is uniquely determined by the rack number and the slot number. Therefore, the rack numbers (the rack number of “CPU rack 00” is “00”) are sorted in ascending order, and in the case of the same rack number, the slot numbers are sorted in ascending order, and the memory of the CPU unit 22 is arranged in order from the first unit. Allocate M memory addresses. The memory M to be allocated is continuously allocated unlike the case of the high function unit.

  By performing the memory address assignment operation described above, a unit input / output table TB as shown in FIG. 26 described later can be created. The input / output table TB is temporarily stored in, for example, a volatile memory (not shown) such as a RAM in the control program development support apparatus 10, or is stored in a nonvolatile memory (not shown) such as a hard disk. Or stored.

  FIG. 26 is a schematic diagram showing an example of the data structure of the input / output table TB stored in the control program development support apparatus 10.

  In this example, by assigning “00” bit, “01” bit, “02” bit,... Of the memory address “0000” channel of the memory M to the input unit 31 arranged in the slot 0 of “rack 00”, It can be made to correspond to “input port 00”, “input port 01”, “input port 02”,... (See FIG. 18), and the “00” bit of the memory address “0001” channel of the memory M, “01” .., “02” bit,... Can be assigned to “input port 10”, “input port 11”, “input port 12”,. Further, by assigning “00” bit, “01” bit, “02” bit,... Of the memory address “0010” channel of the memory M to the output unit 32 arranged in the slot 1 of “rack 00”, “output” Port 00 ”,“ output port 01 ”,“ output port 02 ”,... (See FIG. 18), the“ 00 ”bit of the memory address“ 0011 ”channel of the memory M, the“ 01 ”bit, By assigning “02” bit,..., It is possible to correspond to “output port 10”, “output port 11”, “output port 12”,.

  Similarly, the memory addresses of the memory M can be assigned to the input unit 34 arranged in the slot 1 of the “rack 01” and the output unit 35 arranged in the slot 2 of the “rack 01”. The same applies to “Rack 02” and thereafter.

  When the user creates a control program using the source code editor of the control program development support apparatus 10, as shown in FIG. 20, the memory address (address value) of the memory M is added to the symbol / contact in the figure. Enter.

  FIG. 27 is a display screen showing various data such as addresses for variables. As shown in FIG. 27, the user sets a variable indicating the type of the port in association with the memory address so that it can be understood what type of port of which unit is allocated to the allocated memory address. Sometimes set. 20 and 27, “XX” in the memory address (XX.YY) represents a channel, and “YY” represents a bit in the “XX” channel. In FIG. 20, “I” shown before the memory address (XX.YY) represents an input area memory address, and “Q” represents an output area memory address.

  Specifically, the user describes (inputs) the “00” bit memory address (0.00) of the “0000” channel for the variable “Input1” indicating the type of the input port, and indicates the type of the output port. By describing (inputting) the memory address (10.00) of the “00” bit of the “0010” channel for the variable “Output1” (see FIG. 20), when the input port (contact point) of the variable “Input1” is turned on, A ladder diagram in which the output port (contact point) of the variable “Output1” is turned on is created. Further, the user inputs the “00” bit memory address (1.00) of the “0001” channel for the variable “Input2”, and the “00” bit memory address (11 of the “0011” channel for the variable “Output2”. .00) (see FIG. 20), a ladder diagram is created in which when the input port (contact point) of the variable “Input2” is turned on, the output port (contact point) of the variable “Output2” is turned on.

  On the other hand, in the PLC 200, when various units are installed according to the unit configuration allocated by the control program development support apparatus 10 by the user, a specific memory address is assigned, and the memory M of the CPU unit 22 is assigned to each unit. An area is reserved in advance. That is, the allocation of the memory addresses of the various units actually arranged in the PLC 200 and the allocation of the memory addresses of the various units configured in the control program development support apparatus 10 are the same.

  Then, the control program development support apparatus 10 converts the control program into an object code that can be executed by the CPU unit 22 using the memory address described in the control program, and downloads it to the PLC 200. In the PLC 200, the object code sent from the control program development support apparatus 10 is executed by the CPU unit 22.

JP 2006-243841 A

  By the way, in the PLC 200, the unit configuration is not changed once various units are arranged, and may be changed (specifically, the unit is moved, changed, added or deleted) as necessary. .

  As described above, when the unit configuration is altered, the memory addresses assigned to the various units actually arranged in the PLC 200 are changed. Therefore, the PLC 200 executes the memory addresses assigned to the memory M of the CPU unit 22. The memory address described in the control program, and the variables such as “Input1” and “Output1” set corresponding to the memory address are different. As a result, the memory address described in the control program and the variable And inconvenience that the association with the port becomes meaningless.

  For this reason, the user must change the memory address described in the control program by the control program development support apparatus 10 or change the variable set for the memory address. Is not good.

  Therefore, the present invention is a control program development support device for creating a unit configuration for arranging a plurality of units connected to a CPU unit of a programmable controller in a plurality of slots in a rack, even if the unit configuration is modified Even if the control program is developed, it is not necessary to perform operations such as changing the memory address in the control program, thereby improving the convenience associated with the modification of the unit configuration, the control program development support device, and the control program development support An object is to provide a program and a recording medium.

  In order to solve the above problems, the present invention provides the following control program development support apparatus, control program development support program, and recording medium.

(1) Control program development support device A control program development support device for creating a unit configuration for arranging a plurality of units connected to a CPU unit of a programmable controller in a plurality of slots in a rack, respectively, Memory allocation means for allocating memory addresses of memories in the CPU unit corresponding to a plurality of port IDs uniquely determined for a plurality of ports in the unit, and associated with the plurality of port IDs Address table creation means for creating an address table showing the correspondence between the memory address and the plurality of port IDs, and a variable showing the correspondence between the variables associated with the plurality of port IDs and the plurality of port IDs Variable table that creates the table The address table creating means, and the address table creating means for obtaining a port ID corresponding to the variable from the variable table and obtaining a memory address corresponding to the acquired port ID from the address table. A control program development support apparatus, wherein a port ID in a unit before change is rewritten to a port ID in a unit after change in the address table.

(2) Control program development support program The control unit in the control program development support device for creating a unit configuration for arranging a plurality of units connected to the CPU unit of the programmable controller in a plurality of slots in the rack, Memory allocation means for allocating memory addresses of memories in the CPU unit corresponding to a plurality of port IDs uniquely determined for a plurality of ports in a plurality of units, and corresponding to the plurality of port IDs Address table creating means for creating an address table indicating a correspondence relationship between the associated memory address and the plurality of port IDs, and a correspondence relationship between the variables associated with the plurality of port IDs and the plurality of port IDs Variable table showing To function as a means including a variable table creation means to be created and an address acquisition means for obtaining a port ID corresponding to the variable from the variable table and obtaining a memory address corresponding to the obtained port ID from the address table. A control program development support program according to claim 1, wherein the address table creating means rewrites the port ID in the unit before the change to the port ID in the unit after the change in the address table. Development support program.

(3) Recording medium A computer-readable recording medium in which the control program development support program according to the present invention is recorded.

  Needless to say, the “ID” in the present invention is an abbreviation of “identification” and means an identification code. The rack may be a single rack or may be composed of a plurality of racks.

  According to the present invention, the port ID in the unit before the change is rewritten to the port ID in the unit after the change to the address table, the port ID corresponding to the variable is acquired from the variable table, and the acquired port A memory address corresponding to the ID is acquired from the address table. By doing this, even if the unit configuration is modified, there is no need to perform operations such as changing the memory address in the control program, thereby improving the convenience associated with the modification of the unit configuration.

  In the present invention, for the port ID, a rack path name corresponding to the rack, a slot path name corresponding to any one of the plurality of slots, and a plurality of channels corresponding to any one of the slots A path is set in a path format in which a channel path name corresponding to any one channel and a bit path name corresponding to any one bit among the plurality of bits for any one channel are hierarchically represented in order. A mode provided with the path setting display means displayed on a display screen can be illustrated.

  In this specific matter, for the port ID, a path is set in the path format in which the rack path name, the slot path name, the channel path name, and the bit path name are sequentially represented and displayed on the display screen. By doing so, the user can easily recognize the arrangement positions of the plurality of units by the path.

  In the present invention, in order for the user to input the variable information, the information may include variable information receiving means for receiving the variable input information. However, in this case, there is an advantage that the user can freely create the variable. On the other hand, there is an inconvenience that it takes time to create a name corresponding to the variable.

  Therefore, in the present invention, an aspect comprising variable information receiving means for receiving input information of the variables, and variable information automatic setting means for automatically setting the variables based on a hierarchical physical configuration of the plurality of ports. It can be illustrated.

  In this specific matter, the user selects whether the variable information receiving means inputs the variable input information or the variable information automatic setting means automatically sets the variable as necessary. It becomes possible to do.

  In the present invention, a unit configuration diagram is created by arranging at least one unit of the plurality of units one by one in any one of the plurality of slots in the rack so that the position of the plurality of units can be changed. When the arrangement position of any one unit is changed, the unit includes a unit configuration diagram creating unit that detects which unit of the plurality of units has moved to which slot, and the address table creating unit includes: An example of rewriting the port ID in the unit before the change detected by the unit configuration diagram creating unit to the port ID in the unit after the change detected by the unit configuration diagram creating unit can be exemplified for the address table.

  In this specific matter, when creating the unit configuration diagram, it is possible to detect which unit of the plurality of units has moved to which slot, and thereby, any one of the plurality of units. It is possible to efficiently detect a change in the arrangement position of one unit.

  In the present invention, a unit information storage unit that stores illustration information in which the rack and the plurality of units are illustrated in association with unit information related to the plurality of units, and the unit configuration diagram creating unit includes the unit information storage unit The illustration corresponding to the illustration information of the rack stored in the display is displayed on the display screen, and at least one illustration of the plurality of units corresponding to the illustration information stored in the unit information storage unit is displayed one by one in the rack. A mode of creating a unit configuration diagram by arranging the illustrations of any one of the plurality of slots so that they can be moved and displayed on the display screen by drag and drop can be exemplified. The “illustration (abbreviation of illustration)” here is a concept including illustration images such as figures, pictures, and photographs.

  In this specific matter, at least one illustration of the plurality of units corresponding to the illustration information stored in the unit information storage unit is dragged one by one to the illustration of any of the plurality of slots in the rack. -Since the unit configuration diagram is created by arranging it so that it can be moved and displayed on the display screen by AND-Drop, the unit configuration in the unit configuration diagram can be visually modified by an illustration, and the unit configuration modification work Simplification can be realized.

  As described above, according to the present invention, in the address table, the port ID in the unit before change is rewritten to the port ID in the unit after change, and the port ID corresponding to the variable is obtained from the variable table. Then, by acquiring the memory address corresponding to the acquired port ID from the address table, even if the unit configuration is modified, there is no need to perform operations such as changing the memory address in the control program. Convenience associated with the modification of the unit configuration can be improved.

FIG. 2 is a system configuration diagram schematically showing a control program development support device and a PLC that is set by the control program development support device. FIG. 2 is a system configuration diagram schematically showing an internal structure of the control program development support device shown in FIG. 1. It is a system block diagram which shows roughly the control part in the control program development assistance apparatus shown in FIG. It is the flowchart of the first half part which shows an example of the allocation process which performs the allocation operation | movement of the address of the memory in a CPU unit corresponding to the some port in a some unit. It is a flowchart of the latter half part which shows an example of the allocation process which performs the allocation operation | movement of the address of the memory in a CPU unit corresponding to the some port in a some unit. It is a schematic block diagram which shows an example of the one part data structure of the unit information in a unit information storage part. FIG. 10 is a display screen for displaying “CPU rack 00” and a unit configuration diagram illustrating the units arranged in “CPU rack 00” with illustrations. It is screen explanatory drawing which shows an example of a unit list. It is a display screen which shows the state after modifying a unit structure from the unit structure figure shown in FIG. It is a schematic diagram which shows an example of the data structure of the address table which stores an address with respect to port ID in the unit comprised by the unit block diagram shown in FIG. It is the display screen which displayed the unit block diagram shown in FIG. 7 hierarchically. It is the display screen which displayed the port ID in the path format which expressed hierarchically. It is a schematic diagram which shows an example of the data structure which added the path name in the address table shown in FIG. It is a display screen that displays variables set automatically by extracting from the name of the hierarchical physical configuration of the port. It is a schematic diagram which shows an example of the data structure of the variable table which stores a variable with respect to port ID to which the path | pass was set. It is a schematic diagram which shows an example of the data structure after a unit structure is changed in the address table shown in FIG. 13 is a display screen that is displayed after the unit configuration is modified on the display screen shown in FIG. 12. It is a schematic block diagram of the programmable controller (PLC) which shows an example of the system configuration which connects a CPU unit and various units. It is a display screen which shows the basic screen of a control program development support apparatus. It is a display screen which shows an example of the ladder diagram created with the control program development assistance apparatus. It is a display screen which shows an example of a unit structure information screen. It is a display screen which shows the state which opened the rack item with respect to the unit structure information screen shown in FIG. It is screen explanatory drawing which shows an example of a unit list. It is a display screen which shows the unit composition screen after performing unit registration operation. It is a display screen which shows an example of the unit addition screen. It is a schematic diagram which shows an example of the data structure of the input / output table stored in a control program development support apparatus. It is a display screen which shows various data, such as a memory address with respect to a variable.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiments are examples embodying the present invention, and are not of a nature that limits the technical scope of the present invention.

  FIG. 1 is a system configuration diagram schematically showing a control program development support apparatus 100 and a PLC 200 that is a setting target of the control program development support apparatus 100.

  A programmable controller (hereinafter referred to as a PLC) 200 has the same configuration as the PLC 20 shown in FIG. In FIG. 1, the same members as those shown in FIG.

  That is, the PLC 200 includes a “CPU rack 00” and expansion racks (“rack 01”, “rack 02”,...).

  Each of the “CPU rack 00” and the expansion rack (“rack 01”, “rack 02”,...) Includes a power supply unit 21, and the units arranged in one rack are the power supply units 21 connected to the rack. Receive power supply from.

  The “CPU rack 00” includes a CPU unit 22. The expansion racks (“Rack 01”, “Rack 02”,...) Do not include a CPU unit, and are managed (IO refresh or the like) by the CPU unit 22 in the “CPU rack 00”.

  In the “CPU rack 00”, the I / O control unit 40 is arranged, and in the expansion racks (“rack 01”, “rack 02”,...), The I / O interface unit 50 is arranged. The “CPU rack 00” and the expansion rack (“rack 01”) are connected to each other by the I / O control unit 40 and the I / O interface unit 50 via the wiring cable CB. Further, the expansion racks (“Rack 01”, “Rack 02”,...) Are connected to each other by the I / O interface unit 50 via the wiring cable CB. As a result, the “CPU rack 00” and the expansion racks (“rack 01”, “rack 02”,...) Can cooperate with each other so that they can communicate with each other, and various units necessary for the PLC 200 to perform desired control. (Component units such as an I / O unit, a master unit, a communication unit, and a high-function unit) are connected to each other. In this example, the PLC 200 is constructed by connecting three racks. Of course, the number of racks for constructing the PLC 200 is arbitrary, and there may be one rack (only “CPU rack 00”). That is, the number of expansion racks may be one. Further, only the “CPU rack 00” may be provided without providing an expansion rack. Further, the power supply units 21 mounted in the “CPU rack 00” and the expansion racks (“rack 01”, “rack 02”,...) May be the same type or different types.

  In the example of FIG. 1, the “CPU rack 00” includes an input unit 31 in the slot 0 and an output unit 32 in the slot 1 among a plurality of slots (slot 0, slot 1,...). Also, in “Rack 01”, among the slot 0, slot 1,..., The CPU high-function unit 33 is disposed in the slot 0, the input unit 34 is disposed in the slot 1, and the output unit 35 is disposed in the slot 2.

  Further, the input units 31 and 34 have “input port 00”, “input port 01”, “input port 02” corresponding to contacts (for example, 8 points, 16 points, 32 points, 64 points, etc.) such as sensors and switches. ,... Are provided, and the output units 32 and 35 have “output port 00” and “output port” corresponding to contacts (for example, 8 points, 16 points, 32 points, 64 points, etc.) such as actuators and relays. 01 "," output port 02 ", ... are provided.

  Note that the CPU unit 22 is the same as that shown in FIG. 18, and detailed description thereof is omitted here.

  FIG. 2 is a system configuration diagram schematically showing the internal structure of the control program development support apparatus 100 shown in FIG.

  The control program development support apparatus 100 is a PLC system for constructing a PLC 200 having an arbitrary configuration by combining various units, and for obtaining an appropriate unit configuration when designing a PLC configuration that matches a control target. It has a construction support function.

  The control program development support apparatus 100 having a PLC system construction support function is sometimes called a PLC system construction support apparatus or a configurator. Further, the control program development support device 100 has a function of creating a control program (user program) to be executed by the PLC 200. An example of the control program is a ladder program represented by a ladder diagram. A device having a function of creating a control program is called a ladder editor, or a control program creation device, a control program editing device, or a programming device.

  The control program development support apparatus 100 is configured by installing a predetermined application program for realizing a PLC system construction support function or a user program creation function in a personal computer. Of course, the control program development support apparatus 100 sets various parameters for a normal I / O unit and other units, and downloads the set setting information to each device (unit) via a network or the like. May also be included.

  As shown in FIG. 2, the control program development support apparatus 100 includes an input unit 12 including a keyboard 12a, a pointing device 12b, and the like as an external device (man machine interface), and a display having a display screen 13a (see FIG. 1). The display unit 13 is provided.

  Further, the control program development support device 100, as an internal device, executes a control program development support program, executes various arithmetic processes, and creates various unit processes to create unit configuration information ( Specifically, the CPU 14, an execution processing storage unit 15 that is appropriately used as a work memory when the control unit 14 executes various processes such as arithmetic processing, and a unit information storage unit 16 that stores information about the unit. And a COM port 17 used when downloading information set in the various units constituting the PLC 200 and created in the control unit 14 to the PLC 200, and a reading unit 18.

  The execution processing storage unit 15 includes a volatile memory 15a such as a RAM and a nonvolatile memory 15b such as a hard disk device or a flash memory. The nonvolatile memory 15b includes a control program development support program BP read by the reading unit 18 that reads a recording medium R such as a CD (Compact Disc) -ROM on which a control program development support program BP, which will be described later, is recorded. Software and file data of illustration information to be described later are stored (installed) in advance. The nonvolatile memory 15b stores processing data such as an address table and a variable table described later. The recording medium R may be a USB (Universal Serial Bus) memory or an SD (Secure Digital) memory card.

  The control unit 14 displays various input screens on the display unit 13, and the user operates the input unit 12 to receive necessary information and determines unit configuration information.

  The unit information related to the unit stored in the unit information storage unit 16 is, for example, a list of types, types, etc., specifications such as manufacturer name, voltage, current, etc., functions for each unit, and setting targets. The parameters are channel information about the unit specified by each type, and information for specifying the memory capacity. The unit information storage unit 16 also stores illustration information as will be described later.

  The control unit 14 also provides memory addresses (hereinafter simply referred to as addresses) of the memory M in the CPU unit 22 for I / O data used by basic I / O units such as the input units 31, 34 and the output units 32, 35. Assigns.

[Software configuration of control program development support device]
FIG. 3 is a system configuration diagram schematically showing the control unit 14 in the control program development support apparatus 100 shown in FIG.

  The control unit 14 includes a unit configuration diagram creating unit P1, a memory allocating unit P2, an address table registration unit P3, a variable information receiving unit P4, a path setting display unit P5, a variable information automatic setting unit P6, and a variable table. It functions as a means including a creation means P7, a port ID rewriting means P8, an address acquisition means P9, and a conversion means P10. The address table registration means P3 and the port ID rewriting means P8 constitute the address table creation means of the present invention.

  That is, the control program development support program BP includes a unit configuration diagram creation step corresponding to the unit configuration diagram creation means P1, a memory allocation step corresponding to the memory allocation means P2, and an address table registration corresponding to the address table registration means P3. Variable information receiving step corresponding to variable information receiving means P4, path setting display step corresponding to path setting display means P5, variable information automatic setting step corresponding to variable information automatic setting means P6, variable table creation A step including a variable table creation step corresponding to the means P7, a port ID rewriting step corresponding to the port ID rewriting means P8, an address acquisition step corresponding to the address acquisition means P9, and a conversion step corresponding to the conversion means P10. Control unit 4 to be executed.

  FIGS. 4 and 5 are flowcharts of the first half and the second half, respectively, showing an example of an allocation process for performing an address allocation operation of the memory M in the CPU unit 22 corresponding to a plurality of ports in a plurality of units.

  In the following description, as shown in FIG. 1, the plurality of ports (parameters) are “input port 00”, “input port 01”, “input port 02”,... “Output port 00”, “output port”. .., “0”, “output port 02”,..., And units arranged in slot 0, slot 1,. “Input port 02”,..., “Output port 01”, “output port 02”,.

  Next, flowcharts of the allocation processing examples shown in FIGS. 4 and 5 will be described below with reference to FIGS.

[Unit configuration drawing creation step S1]
The unit configuration diagram creation step S1 shown in FIG. 4 is a unit configuration diagram in which at least one of unit 0, unit 1,... Is arranged in one of a plurality of slots in the rack in such a manner that its position can be changed. When the arrangement position of any one of unit 0, unit 1,... Is changed and the unit configuration is modified, any unit of unit 0, unit 1,. It has come to detect whether it has moved to.

  Specifically, in the unit configuration diagram creation step S1, the control unit 14 displays an illustration of “CPU rack 00” on the display screen 13a (see FIG. 1) of the display unit 13, and further displays the unit illustration in a movable manner. Create a unit configuration diagram.

  FIG. 6 is a schematic configuration diagram illustrating an example of a partial data structure of the unit information in the unit information storage unit 16. FIG. 7 is a display screen for displaying “CPU rack 00” and a unit configuration diagram showing the units arranged in “CPU rack 00” in illustration.

  In the unit information storage unit 16 (see FIG. 2), as shown in FIG. 6, illustration information IL illustrating a plurality of units 0, 1, 1,... Are stored in advance in association with the model TY and the name TN relating to. In the present embodiment, the illustration information IL is the name of the file data, and the control unit 14 determines the file stored in the nonvolatile memory 15b of the execution processing storage unit 15 (see FIG. 2) from the name of the file data. The data is read out and the selected unit among the units 0, 1, 1,... Is illustrated. Although not shown in FIG. 6, the unit information storage unit 16 also stores illustration information IL of “CPU rack 00”, “rack 01”, “rack 02”,.

  Specifically, in the unit configuration diagram creation step S1, the control unit 14 reads the illustration information IL corresponding to “CPU rack 00” from the unit information storage unit 16, and displays the illustration of “CPU rack 00” based on the read illustration information IL. The information is displayed on the display screen 13a of the display unit 13.

  FIG. 8 is an explanatory diagram of a screen showing an example of the unit list. In creating the unit configuration, the user operates the pointing device 12b (see FIG. 1) to select any slot (for example, slot 3) in the illustration of “CPU rack 00” by double-clicking or the like. The unit selection screen shown is displayed in a separate window. That is, when the control unit 14 receives a click operation of the pointing device 12b by the user at the slot position of the “CPU rack 00” (for example, slot 3), the control unit 14 displays the unit type information obtained by referring to the unit information storage unit 16. Displayed on the unit selection screen (see FIG. 8). The unit selection screen is the same as the unit selection screen shown in FIG. 23, and detailed description thereof is omitted here.

  When the user operates the pointing device 12b to select “+” on the tree display screen by double clicking or the like, the tree display is expanded. That is, when the control unit 14 receives “+” on the tree display screen when the user clicks on the pointing device 12b, the control unit 14 displays the unit information obtained by referring to the unit information storage unit 16 on the unit selection screen of FIG. To do. On the unit selection screen displayed in this way, the user searches for a unit to be used from the unit list and operates the pointing device 12b to select it. That is, when the control unit 14 receives a click operation of the pointing device 12b by the user at the position of the selected unit (for example, CJ1W-OD202) on the unit selection screen, the control unit 14 refers to the unit information storage unit 16 to obtain the unit information obtained. The illustration information IL is illustrated and displayed at the slot position (for example, slot 3) of “CPU rack 00” in the unit configuration diagram shown in FIG. At this time, unit information such as model, name, and specification is displayed on the unit information screen W3 on the right side of the unit configuration diagram in FIG.

  In this way, one of the illustrations of unit 0, unit 1,... Is displayed on the display screen 13a of the display unit 13 for any one of slots 0, 1, 2,. Arrange and create unit configuration diagram.

  In the unit configuration diagram creation step S1, the control unit 14 can modify the unit configuration by performing the following unit addition, movement, and deletion operations.

  FIG. 9 is a display screen showing a state after the unit configuration is modified from the unit configuration diagram shown in FIG.

  In modifying the unit configuration of the unit configuration diagram shown in FIG. 7, the user operates the pointing device 12b to select an illustration of the unit, and drags and drags the illustration of the selected unit (for example, unit 0 in slot 0). It is moved to another slot (for example, slot 1) by dropping. That is, when the control unit 14 receives a dragging of the pointing device 12b by the user at the position of the selected unit (for example, unit 0 of slot 0) on the unit selection screen, the control unit 14 moves the selected unit with the cursor, and moves to another slot. When the user drops the pointing device 12b at the position (for example, slot 1), the selected unit (for example, unit 0 in slot 0) is moved to another slot (for example, slot 1). At this time, the control unit 14 moves the unit (for example, unit 1) in the other slot (for example, slot 1) to the slot (for example, slot 0) of the selected unit. The control unit 14 also displays the position information of the unit to be moved (see the unit information screen W3 in FIG. 9 and the position information screen W4 on the lower right of the unit configuration diagram). In addition, when displaying positional information, the content of the unit information on the unit information screen W3 displayed on the positional information screen W4 is displayed in a simplified manner. In addition, when the control unit 14 moves the selected unit (for example, unit 0) across one or a plurality of slots (for example, slot 1), the control unit 14 (for example, slot 2) has a unit (for example, slot 2). Unit 2) may be replaced with a selected unit (for example, unit 0), or a slot of the selected unit (for example, slot 0), next to it (the side on which the selected unit 0 has been moved, The unit (for example, unit 1) in the slot (eg, slot 1) on the right side in FIG. 7 is moved, and the slot (for example, slot 1 of unit 1) in the moved unit is moved to the slot (right side in FIG. For example, the unit of slot 2) (for example, unit 2) may be moved.

  In this way, the control unit 14 transfers at least one illustration of unit 0, unit 1,... (For example, unit 0) to one of the slots 0, 1, 2,. A unit configuration diagram is created by arranging a single illustration so that it can be moved and displayed on the display screen 13a of the display unit 13 by drag and drop (see FIG. 9).

  Further, the user operates the pointing device 12b to select a unit illustration, and deletes (deletes) the illustration of the selected unit (for example, the unit in slot 3) by a deletion operation. That is, when the control unit 14 receives a click operation of the pointing device 12b by the user at the position of the selected unit (for example, the unit in slot 3) on the unit selection screen, the control unit 14 displays the selected unit (for example, reverse display). When a pressing operation of a predetermined key (for example, delete [delete] key) of the user's keyboard 12a (see FIG. 1) is accepted, the slit (for example, slit 3) in which the selected unit (for example, the unit of slot 3) is arranged Delete (erase) from.

  The non-volatile memory 15b of the execution processing storage unit 15 stores a slot position (slot number) associated with position information on the screen in association with each other. As a result, the control unit 14 can detect (recognize) that the unit configuration has been modified, and further, which illustration of the unit 0, unit 1,... Has moved to which slot.

[Memory allocation step S2]
Next, in the memory allocation step S2 shown in FIG. 4, the control unit 14 allocates addresses of the memory M (see FIG. 1) in the CPU unit 22 of the units 0, 1,. This address allocation processing is the same as the conventional method described in the above-mentioned background art section (see the description in FIG. 26), and detailed description thereof is omitted here.

  And the control part 14 is set so that several port ID can be identified with respect to each of several ports. Thereby, a plurality of port IDs are uniquely determined for a plurality of ports.

[Address Table Registration Step S3]
In determination step S31 shown in FIG. 4, the control unit 14 determines whether or not an address table TB1 shown in FIG. 10 to be described later is newly registered, that is, whether or not data is registered in the address table TB1. When the data is not registered in the address table TB1 (step S31: Yes), the process proceeds to the address table registration step S3, while when the data is registered in the address table TB1 (step S31: No), The process proceeds to variable information receiving step S4.

  In the address table registration step S3, as shown in FIG. 10, which will be described later, the control unit 14 is associated with a plurality of port IDs uniquely determined for the ports Pt in the unit 0, unit 1,. An address table TB1 indicating the correspondence between addresses and a plurality of port IDs is registered. In the present embodiment, the address table TB1 is stored in the nonvolatile memory 15b of the execution process storage unit 15.

  FIG. 10 is a schematic diagram showing an example of the data structure of the address table TB1 that stores addresses for the port IDs in the units configured in the unit configuration diagram shown in FIG.

  In this example, the port ID “0000” of “input port 00”, “input port 01”, “input port 02”,... For the input unit 0 (model CJ1W-ID 201) arranged in slot 0 of “rack 00”. , “0001”, “0002”,..., “00” bit, “01” bit, “02” bit,... Of the address “0000” channel of the memory M are assigned to “input port 10”, “input”. Corresponding to port IDs “0100”, “0101”, “0102”,... Of port 11 ”,“ input port 12 ”,...,“ 00 ”bit,“ 01 ”bit of address“ 0001 ”channel of memory M, Allocate “02” bit,. Further, for the output unit 1 (model CJ1W-OC201) arranged in the slot 1 of the “rack 00”, the port IDs “1000”, “1000” of “output port 00”, “output port 01”, “output port 02”,. Corresponding to “1001”, “1002”,..., “00” bit, “01” bit, “02” bit,... Of the address “0010” channel of the memory M are allocated, “output port 10”, “output port 11”. “00” bit, “01” bit, “02” bit,... Of the address “0011” channel of the memory M are assigned to “output port 12”,. The value of the port ID is a value that does not change with respect to the unit even if the unit configuration is modified.

[Variable information receiving step S4]
Next, in the variable information receiving step S4 shown in FIG. 4, the control unit 14 receives input information of the variable Var associated with the port ID by an input operation using the keyboard 21a (see FIG. 1).

  Specifically, as shown in FIG. 11 described later, the control unit 14 hierarchically displays the units configured in the unit configuration diagram shown in FIG.

  FIG. 11 is a display screen in which the unit configuration diagram shown in FIG. 7 is hierarchically displayed. In FIG. 11 and FIGS. 12, 14, and 17 described later, “R” means reading, “W” means writing, and “RW” means both reading and writing.

  In this example, the port Pt of the input unit 0 (model CJ1W-ID201) has a hierarchical physical configuration such as a rack hierarchy, a unit hierarchy, and a port hierarchy. Of these hierarchical physical configurations, the rack hierarchy is “ “CPU Rack 0”, the unit hierarchy is represented by “CJ1W-ID201 (DC input unit)”, and the port hierarchy is represented by “Ch1_In”. The port Pt of the output unit 1 (model CJ1W-OC201) is expressed as “CPU Rack 0” in the rack hierarchy, “CJ1W-OC201 (relay contact output unit)” in the rack hierarchy, and “Ch1_Out” in the port hierarchy.

  In the present embodiment, the control unit 14 receives comment information Co corresponding to the variable Var by an input operation using the keyboard 21a.

[Path setting display step S5]
Next, in this Embodiment, the control part 14 implements path | pass setting display step S5 shown in FIG. Specifically, in determination step S51, the control unit 14 determines whether or not to display the port ID in a path format. That is, when the control unit 14 receives a click operation of the pointing device 12b by the user with respect to an icon (not shown) that instructs to display the port ID in the path format (determination step S51: Yes), the path setting display step S5. As shown in FIG. 12 to be described later, the path Pa is displayed on the display screen 13a of the display unit 13 in a path format in which a rack path name, a slot path name, a channel path name, and a bit path name are sequentially represented with respect to the port ID. To display.

  FIG. 12 is a display screen that displays the port IDs in a hierarchical format that represents the port IDs. FIG. 13 is a schematic diagram illustrating an example of a data structure in which a path name is added to the address table TB1 illustrated in FIG.

  In this example, the port Pt of the input unit 0 (model CJ1W-ID201) corresponds to the rack path name “rack # 0” in FIG. 12 corresponding to “CPU rack 00” in FIG. 13 and the slot 0 in FIG. The slot path name in FIG. 12 is “slot # 0”, the channel path name in FIG. 12 corresponding to the channel “0000” in FIG. 13 is “Ch1_In”, and the bit path name in FIG. 12 corresponding to the bit “xx” in FIG. Is set to “Ch_Inxx”. The port Pt of the output unit 1 (model CJ1W-OC201) has the rack path name “rack # 0” in FIG. 12 corresponding to “CPU rack 00” in FIG. 13 and the slot in FIG. 12 corresponding to slot 1 in FIG. The path name is “slot # 1”, the channel path name in FIG. 12 corresponding to the channel “0010” in FIG. 13 is “Ch1_Out”, and the bit path name in FIG. 12 corresponding to the bit “xx” in FIG. 13 is “Ch_Out ×”. “X” is set. Note that “XX” is a value corresponding to a bit of the address.

  In this way, the control unit 14 determines, for the port ID, the rack path name corresponding to “CPU rack 00”, the slot path corresponding to any one of slot 0, slot 1, slot 2,. Name, a channel path name corresponding to any one channel among a plurality of channels for any one slot, and a bit path name corresponding to any one bit among a plurality of bits for any one channel in order A path Pa is set in the path format expressed and displayed on the display screen 13 a of the display unit 13. It should be noted that the path Pa may always be displayed without operating an icon (not shown) that instructs to display the port ID in the path format.

[Variable information automatic setting step S6]
Next, in this Embodiment, the control part 14 implements variable information automatic setting step S6 shown in FIG. Specifically, in determination step S61, the control unit 14 determines whether or not to automatically set the variable Var. That is, when the control unit 14 receives a click operation of the pointing device 12b by the user for an icon (not shown) that instructs automatic setting of the variable Var (determination step S61: Yes), in the variable information automatic setting step S6, As shown in FIGS. 11 and 12, the variable Var extracted from the name of the hierarchical physical configuration of the port is automatically set and displayed on the display screen 13 a of the display unit 13.

  FIG. 14 is a display screen that displays the variable Var extracted and automatically set from the name of the hierarchical physical configuration of the port.

  In this example, the variable Var of the input unit 0 (model CJ1W-ID201) is the device name “J01” (see the position information screen W4 in FIG. 9) in which the first three digits are attached to the unit “CJ1W-ID201” in the unit layer. The middle three digits are “Ch1” acquired from at least two characters of “Ch1_In” in the port hierarchy, and the last two digits or four digits are the serial numbers for “Ch1_In” in the port hierarchy. .

  Although omitted in the flowchart shown in FIG. 4, the control unit 14 returns to the variable information receiving step S <b> 4 when the user clicks on the pointing device 12 b to any one of the variables Var and performs the click operation. The input information of the variable Var is received by an input operation using the keyboard 21a.

  Next, in determination step S62 shown in FIG. 5, the control unit 14 determines whether or not to determine the variable Var. That is, when the variable Var is not fixed in the determination step S62 (determination step S62: No), the control unit 14 receives a click operation of the pointing device 12b by the user with respect to an icon (not illustrated) that instructs the end of the process. Until (judgment step S63: No), the process proceeds to variable information acceptance step S4 to accept input information of variables. On the other hand, when a click operation for an icon instructing the end of the process is received (judgment step S63: Yes), The process proceeds to determination step S82.

  On the other hand, when the control unit 14 receives a click operation of the pointing device 12b by the user with respect to the icon (not shown) for instructing the confirmation of the variable Var in the determination step S62 (determination step S62: Yes), the variable table creation step S7. Migrate to

[Variable table creation step S7]
In the variable table creation step S7, the control unit 14 creates a variable table TB2 (see FIG. 15 to be described later) indicating the correspondence between the variable Var and the port ID associated with the port ID.

  FIG. 15 is a schematic diagram illustrating an example of a data structure of a variable table TB2 that stores a variable Var for a port ID for which a path Pa is set. The variable table TB2 is stored in the nonvolatile memory 15b of the execution process storage unit 15.

  In the number table TB2 shown in FIG. 15, variable names and data types are stored in association with port IDs and their path names. In this example, a path Pa of “rack # 0 / slot # 0 / Ch1_In” is stored for a byte type (8 bits) variable Var (“J01_Ch1_In”), and a Boolean type (1 bit) variable Var ( For “J01_Ch1_In00” to “J01_Ch1_In07”), paths Pa of “rack # 0 / slot # 0 / Ch1_In00” to “rack # 0 / slot # 0 / Ch1_In07” are stored, respectively.

[Port ID rewriting step S8]
In the determination step S81 shown in FIG. 5, the control unit 14 determines whether the arrangement position of any one of the unit 0, unit 1,... Has been changed, the unit has been added, or the unit has been added. It is determined whether it has been deleted (unit configuration has been altered). When the control unit 14 determines that the unit configuration has been modified in the unit configuration diagram creation step S1 (determination step S81: Yes), the control unit 14 proceeds to the port ID rewriting step S8, but determines that the unit configuration has not been modified. If so (determination step S81: No), the process proceeds to determination step S63.

  In the port ID rewriting step S8, the control unit 14 performs the unit configuration diagram creation step S1 on the address table BT1 when the unit configurations of the units 0, 1 and so on are modified in the unit configuration diagram creation step S1. The port ID (specifically, the port ID for which the path Pa is set) in the unit before change (for example, unit 0, unit 1) detected in (1) is changed to the unit (after change) detected in the unit configuration diagram creation step S1. For example, it is rewritten to the port ID in unit 1, unit 0).

  FIG. 16 is a schematic diagram showing an example of the data structure after the unit configuration is modified in the address table TB1 shown in FIG. FIG. 17 is a display screen displayed after the unit configuration is modified on the display screen shown in FIG.

  In this example, the unit 0 in the slot 0 and the unit 1 in the slot 1 are interchanged with each other.

  That is, as indicated by α in FIG. 13, the port ID “0000” stored in the “00” bit of the “0000” channel, the “01” bit of the “0000” channel, the “02” bit of the “0000” channel,. "(Rack # 0 / slot # 0 / Ch1_In / Ch1_In00" in the path format), "0001" ("rack # 0 / slot # 0 / Ch1_In / Ch1_In01" in the path format), "0002" (" track # 0 / slot # 0 / Ch1_In / Ch1_In02 ”), as shown by α in FIG. 16,“ 00 ”bit of“ 0010 ”channel,“ 01 ”bit of“ 0010 ”channel,“ 0010 ”channel It is rewritten to the address of “02” bit,.

  Further, as indicated by β in FIG. 13, the port ID “1000” stored in the “00” bit of the “0010” channel, the “01” bit of the “0010” channel, the “02” bit of the “0010” channel,. "(Rack # 0 / slot # 1 / Ch1_Out / Ch1_Out00" in the path format), "1001" ("rack # 0 / slot # 1 / Ch1_Out / Ch1_Out01" in the path format), "1002" (" track # 0 / slot # 1 / Ch1_Out / Ch1_Out02 ”), as shown by β in FIG. 16,“ 00 ”bit of“ 0000 ”channel,“ 01 ”bit of“ 0000 ”channel,“ 0000 ”channel It is rewritten to the address of “02” bit,.

  When the path Pa is set as the port ID, the port Pt of the input unit 0 (model CJ1W-ID 201 in this example) has the rack path name of FIG. 17 corresponding to “CPU rack 00” of FIG. The slot path name of FIG. 17 corresponding to slot 1 of FIG. 16 is “slot # 1”, the channel path name of FIG. 17 corresponding to channel “0010” of FIG. 16 is “Ch1_In”, FIG. The bit path name of FIG. 17 corresponding to the bit “xx” is set to “Ch_Inxx”. The port Pt of the output unit 1 (model CJ1W-OC201 in this example) has a rack path name “rack # 0” in FIG. 17 corresponding to “CPU rack 00” in FIG. 16, and a diagram corresponding to slot 0 in FIG. The slot path name of FIG. 17 is “slot # 0”, the channel path name of FIG. 17 corresponding to the channel “0000” of FIG. 16 is “Ch1_Out”, and the bit path name of FIG. 17 corresponding to the bit “xx” of FIG. Set to “Ch_Outxx”. Note that “XX” is a value corresponding to a bit of the address.

  In the flowchart shown in FIG. 5, when the determination step S81 is removed and the variable Var is determined in the determination step S62 (determination step S62: Yes), the port ID rewriting step S8 may always be processed.

  Also in the variable table TB2 shown in FIG. 15, if the arrangement position of any one of the units 0, 1, 1,... Settings are updated.

[Address acquisition step S9]
Next, in determination step S82 shown in FIG. 5, the control unit 14 determines whether or not to convert the control program into an object code. That is, when the control unit 14 receives a click operation of the pointing device 12b by the user with respect to an icon (not shown) instructing conversion of the control program into an object code (determination step S82: Yes), the control unit 14 proceeds to the address acquisition step S9. Transition.

  In the address acquisition step S9, the control unit 14 acquires the port ID corresponding to the variable Var described in the control program from the variable table TB2 (see FIG. 15), and the address corresponding to the acquired port ID is updated with data. Obtained from the address table TB1 (see FIG. 16).

  For example, the port ID “0000” (“rack # 0 / slot # 0 / Ch1_In / Ch1_In00” in the path format) corresponding to the variable Var (“J01_Ch1_In00”) of the variable table TB2 shown in FIG. 15 before the unit configuration is modified. ) Is the bit “00” of the channel “0000” in the address table TB1 shown in FIG. 13, whereas in the address table TB1 shown in FIG. The address corresponding to “0000” (“rack # 0 / slot # 1 / Ch1_In / Ch1_In00” in the path format) is the bit “00” of the channel “0010”. Therefore, when the user creates the control program, if the variable Var indicating the type of the port Pt is described, the address corresponding to the variable Var is automatically changed even if the unit configuration is modified. Therefore, there is no need to be aware of the address. That is, it is not necessary to change the control program according to the modification of the unit configuration. The path Pa set to the port ID “0000” corresponding to the variable Var (“J01_Ch1_In00”) of the variable table TB2 illustrated in FIG. 15 is “rack # 0 / slot #” as illustrated in FIGS. Since it is updated to “1 / Ch1_In / Ch1_In00”, the user can refer to the latest path Pa.

[Conversion Step S10]
In the conversion step S10 shown in FIG. 5, the control program is converted (specifically compiled) into an object code that can be executed by the CPU unit 22 using the acquired address.

  As described above, according to the control program development support device 100 according to the present embodiment, when the unit configuration is modified, the port ID in the unit before the change is changed to the address table TB1 after the change. The port ID in the unit is rewritten, the port ID corresponding to the variable Var is acquired from the variable table TB2, and the address corresponding to the acquired port ID is acquired from the address table TB1. By doing this, even if the unit configuration is modified, the address described in the control program by the variable table TB2, and further the relationship between the variable and the port Pt is maintained. It is not necessary to perform a change operation of the variable or a variable set for the address, thereby improving the convenience associated with the modification of the unit configuration.

  By the way, conventionally, since the address set in the variable Var only represents the memory area allocated to the memory M of the CPU unit 22, the user can recognize the unit arrangement position from the address. It was difficult.

  In this regard, in the present embodiment, the path Pa is set and displayed in a path format in which the rack path name, slot path name, channel path name, and bit path name are sequentially represented for the port ID. The unit arrangement position can be easily recognized simply by looking at the path Pa.

  In the present embodiment, the variable information receiving step S4 and the variable information automatic setting step S6 are performed. Therefore, the input information of the variable Var is input in the variable information receiving step S4, or the variable information automatic setting is performed. Whether the variable Var is automatically set in step S6 can be properly used by the user as needed.

  Also, in this embodiment, when creating a unit configuration diagram, it is possible to detect which slot the unit has moved to, thereby efficiently detecting a change in the arrangement position of the unit. It becomes possible.

  The unit configuration diagram may be a tree-like structure diagram as shown in FIG. 24. In the present embodiment, the unit illustration is displayed by dragging and dropping the unit illustration on the slot illustration. Since the unit configuration diagram is created by arranging it on the 13 display screens 13a so that it can be moved and displayed, the unit configuration in the unit configuration diagram can be visually modified by an illustration, facilitating the modification work of the unit configuration. It becomes possible to do.

  In the present embodiment, “CPU rack 00” has been described, but the same can be applied to expansion racks (“rack 01”, “rack 02”,...). In the present embodiment, a plurality of PLCs 200 may be provided, and a plurality of PLCs 200 may be connected to each other via a network such as a LAN. In this case, as a display form of the path Pa set in the port ID, a display form in which a network path name (for example, PLC name) is added to the head can be exemplified.

DESCRIPTION OF SYMBOLS 13 Display part 13a Display screen 14 Control part 16 Unit information storage part 22 CPU unit 31, ... Unit 100 Control program development support apparatus 200 PLC
BP Control program development support program M Memory Pa Path Pt Port P1 Unit configuration diagram creation means P2 Memory allocation means P3 Address table registration means P4 Variable information reception means P5 Path setting display means P6 Variable information automatic setting means P7 Variable table creation means P8 Port ID rewriting means P9 Address obtaining means P10 Conversion means R Recording medium TB1 Address table TB2 Variable table Var Variable

Claims (7)

A control program development support device for creating a unit configuration for arranging a plurality of units connected to a CPU unit of a programmable controller in a plurality of slots in a rack,
Memory allocating means for allocating memory addresses of memories in the CPU unit corresponding to a plurality of port IDs uniquely determined for a plurality of ports in the plurality of units;
Address table creating means for creating an address table indicating a correspondence relationship between the plurality of port IDs and the memory addresses associated with the plurality of port IDs;
Variable table creating means for creating a variable table indicating a correspondence relationship between the variables associated with the plurality of port IDs and the plurality of port IDs;
An address acquisition means for acquiring a port ID corresponding to the variable from the variable table, and acquiring a memory address corresponding to the acquired port ID from the address table;
The address table creating means rewrites the port ID in the unit before the change to the port ID in the unit after the change with respect to the address table. A control program development support apparatus according to claim 1,
For the port ID, a rack path name corresponding to the rack, a slot path name corresponding to any one of the plurality of slots, and any one of a plurality of channels corresponding to the one slot. A path is set in a path format that hierarchically represents a channel path name corresponding to the channel and a bit path name corresponding to any one of the plurality of bits for any one of the channels, and displayed on the display screen. A control program development support device comprising path setting display means for causing the control program to be displayed. A control program development support device according to claim 1 or 2,
Control program development, comprising: variable information receiving means for receiving input information of the variables; and variable information automatic setting means for automatically setting the variables based on a hierarchical physical configuration of the plurality of ports. Support device. A control program development support device according to any one of claims 1 to 3,
A unit configuration diagram is created by arranging at least one unit of the plurality of units one by one in any one of the plurality of slots in the rack so that the position of the unit can be changed. A unit configuration diagram creating means for detecting which unit of the plurality of units has moved to which slot when the arrangement position of the unit is changed;
The address table creation means, for the address table, the port ID in the unit before change detected by the unit configuration diagram creation means, and the port ID in the unit after change detected by the unit configuration diagram creation means Control program development support device characterized by rewriting to A control program development support device according to claim 4,
A unit information storage unit for storing illustration information in which the rack and the plurality of units are illustrated in association with unit information related to the plurality of units;
The unit configuration diagram creating means displays an illustration corresponding to the illustration information of the rack stored in the unit information storage unit on a display screen, and the plurality of units corresponding to the illustration information stored in the unit information storage unit A unit configuration diagram is created by arranging at least one illustration of each one so that it can be moved and displayed on the display screen by drag and drop with respect to any one of the plurality of slots in the rack. A control program development support device characterized by the above. A control unit in the control program development support device for creating a unit configuration for arranging a plurality of units connected to the CPU unit of the programmable controller in a plurality of slots in the rack,
Memory allocating means for allocating memory addresses of memories in the CPU unit corresponding to a plurality of port IDs uniquely determined for a plurality of ports in the plurality of units;
Address table creating means for creating an address table indicating a correspondence relationship between the plurality of port IDs and the memory addresses associated with the plurality of port IDs;
Variable table creating means for creating a variable table indicating a correspondence relationship between the variables associated with the plurality of port IDs and the plurality of port IDs;
A control program development support program for causing a port ID corresponding to the variable to be acquired from the variable table, and for causing a memory address corresponding to the acquired port ID to be acquired from the address table. There,
The address table creating means rewrites the port ID in the unit before the change to the port ID in the unit after the change with respect to the address table.   A computer-readable recording medium on which the control program development support program according to claim 6 is recorded.

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