JP2006268593A - Programmable controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a programmable controller configured to record all transfer data. <P>SOLUTION: The programmable controller is connected to a CPU module comprising a data trace function and an IO module comprising an IO channel via a bus and refers to a result of tracing due to the data trace function by a programming tool that is operated by a personal computer. The programmable controller comprises: a slot number designating means for designating a slot number of the IO module on a sampling trace setting screen of the programming tool; and a device change recording means for registering, in a sampling device table, a bit device of the IO module designated by the slot number designating means and recording a device name and its value in a sampling data region by the CPU module, when the value of the bit device is changed, in accordance with the sampling device table. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a programmable controller, and more particularly to an improvement in a data trace function of a CPU module constituting the programmable controller and a trace display and setting function of a programming tool.

  As shown in FIG. 5, a programmable controller (PLC) of a stored program repetitive calculation method in the prior art includes a CPU module 11 that performs program execution processing and I / O data update processing, and an IO channel that inputs and outputs externally. Are connected to each other through a bus.

The IO module 12 and the high-function IO module 13 have a memory that can be read and written from the CPU module 11 via a bus. This memory includes a bit device that is a real IO and a register device that is a memory space inside the module.
The bit devices of the IO module 12 and the high function IO module 13 have a mapping in the CPU module 11. When the real IO is an input terminal, the state of the real IO is copied to the map at regular intervals. When the real IO is an output terminal, the mapping information is copied to the real IO at regular intervals.
Further, the bit devices of the IO module 12 and the high function IO module 13 are used as flags when the IO module 12 and the high function IO module 13 are operated from the CPU module 11 in addition to the usage as a simple IO.
The register devices of the IO module 12 and the high-function IO module 13 are used to exchange setting parameters and communication data of these modules.

  The CPU module 11 has a data trace function for recording data changes. The trace result can be referenced in a chart format by a programming tool operating on the personal computer 14. Such a function is called sampling trace.

As shown in FIG. 6, (1) a user registers a device for performing sampling trace on the sampling trace setting screen of the programming tool of the personal computer. Also specify the sampling trigger.
(2) When the settings on the sampling trace setting screen are transferred to the CPU module 11, the CPU module 11 creates the sampling device table shown in FIG.
(3) Each time a sampling trigger occurs, the CPU module 11 writes device data into the sampling data table according to the sampling device table. A plurality of sampling data tables are prepared.
(4) When the sampling data table area disappears or a trigger specified separately by the user occurs, the CPU module 11 ends the sampling trace and transfers all the sampling data tables to the programming tool.
(5) On the sampling trace screen of the programming tool shown in FIG. 8, the bit device displays a timing chart and the word device displays numerical values in time series.

Japanese Patent Laid-Open No. 9-282030 (page 2 to page 3 FIG. 1)

However, in the programmable controller described in the prior art, when a sampling trace of the register device of the IO module or the high-function IO module is desired to be sampled and traced, the register device of the IO module does not have a mapping. There is a problem that it takes time and effort.
In addition, when accessing a plurality of consecutive points from the CPU module to the register device of the IO module or the high-function IO module, there is a problem that the plurality of points cannot be recorded by the conventional technique.
These problems occur when the communication data is exchanged with the CPU module via the register device of the communication module. Therefore, the communication data is traced particularly in a high-function IO module that performs communication.

  Therefore, by specifying an IO module or high-function IO module, the relay device of that module can be automatically recorded in the sampling device table, and specifying an IO module or high-function IO module Thus, there is a problem to be solved by monitoring the access from the CPU module to the register device of the module and recording all the transfer data.

  In order to solve the above problems, the programmable controller of the present invention has the following configuration.

(1) The programmable controller includes a CPU module having a function for performing program execution processing, IO data update processing, a data trace function for recording data changes, and an IO channel for input / output to / from the outside. A programmable controller that is connected to an IO module via a bus, and that allows a trace result by the data trace function to be referred to in a chart format by a programming tool that operates on a personal computer, the programming controller that operates on the personal computer In the sampling trace setting screen, the slot number designation means for designating the slot number of the IO module and the bit device of the IO module designated by the slot number designation means Registered in the table, the CPU module in accordance with the sampling device table, when the value of the bit device is changed, is that with a, and the device changes recording means for recording the device name and its value to the sampling data area.
(2) When the slot number is specified by the slot number specifying means, the data trace function of the CPU module monitors the access to the register device of the IO module, and reads / writes and accesses when the access occurs The programmable controller according to (1), wherein the score and access data are recorded in the sampling data area.

According to this proposal, when the slot number of an IO module is specified, the bit device of the IO module is automatically registered in the sampling device table. Can be reduced.
In addition, by monitoring the access from the CPU module to the register device of the IO module in the designated slot, all transfer data can be recorded even in the case of multi-point access.
These effects are effective for confirming transmission / reception data in a time series with a communication module or the like, or for confirming the operation procedure of other high-function modules.

  Next, an embodiment of a programmable controller according to the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated to the same thing as what was demonstrated by the prior art.

The programmable controller of the present invention, like the programmable controller described in the prior art shown in FIG. 5, is a CPU having a program execution process, a function for performing IO data update processing, and a data trace function for recording data changes. A programming tool that connects the module 11 to a high-function IO module 13 and an IO module 12 having an IO channel for inputting / outputting to / from the outside via a bus and operates a trace result by the data trace function on the personal computer 14. It is configured so that it can be referenced in chart format.
In the sampling trace setting screen by the programming tool operating on the personal computer 14 shown in FIG. 1, there is provided slot number specifying means for specifying the slot number of the IO module 12 (or high function IO module 13).
The bit device of the IO module 11 designated by the slot number designation means shown in FIG. 3 is registered in the sampling device table, and the CPU module 11 changes the device name when the value of the bit device changes according to the sampling device table. And device change recording means for recording the value in the sampling data area.
When the slot number is designated by the slot number designation means, the data trace function of the CPU module 11 shown in FIG. 2 monitors the access to the register device of the IO module 12 or the high-function IO module 13 and When the access occurs, read / write, the number of access points, and access data are recorded in the sampling data area.
Hereinafter, the trace by the sampling trace setting screen will be described in order.

(1) On the sampling trace setting screen by the programming tool of the personal computer shown in FIG. 1, the slot number is specified by setting the sampling device. This slot number indicates the mounting position of the IO module 12 or the high-function IO module 13.
(2) When the settings on the sampling trace setting screen shown in FIG. 2 and FIG. 3 are transferred to the CPU module 11, the CPU module 11 checks the bit device of the IO module 12 or the high-function IO module 13 in the designated slot to obtain the sampling device. Create a table automatically.
(3) The CPU module 11 shown in FIG. 3 monitors the mapping by the bit device change monitoring function according to the sampling device table, and records the device name and value in the sampling data area when the value changes. The device access monitoring function shown in FIG. 3 monitors the register device access from the CPU module 11 to the designated slot, and when access occurs, reads / writes the access points / access data to the sampling data area. Record.
(4) When the sampling data area disappears or by a separately designated trigger, the CPU module 11 ends the sampling trace and transfers all the sampling data areas to the programming tool.
(5) As shown in FIG. 4, the results of the trace display the relay device and the register device in time series in the same view as a log image on the sampling trace screen of the programming tool.
Only the relay device can be displayed in the conventional chart format. At this time, the register device displays read / write, the number of access points, the first data of the first point, and the like.
For example, in FIG. 4, the address 0009 is “Y333 ON”, “Y” is the output IO, “333” at the leftmost end of “333” is the slot number, and the right two digits “33” is the terminal number. Show. This terminal number represents 1 to 64.
The next address 0008 is “X301 ON”, where “X” indicates the input IO, “3” at the leftmost end of “301” indicates the slot number, and “01” at the right two digits indicates the terminal number. This means that a copy of the mapping has been received because it has been input to the module of slot number 3. The change of this value is traced, and the data at that time is sequentially recorded in the sampling data area.
This recording is performed by “WRITE 5, 0000, 0001, 34AF, AE00, 5699” at the next address 0007.
By turning off “Y333” and “X301” at the next addresses 0006 and 0005, the results of the trace can be expressed in time series.

  When the slot number of the module is designated, the bit device of the module is automatically registered in the sampling table, so that it is possible to provide a programmable controller that can reduce the user's effort when it is desired to check the relay device change of the designated module.

It is explanatory drawing which showed the image of the sampling trace setting screen of this invention. It is explanatory drawing which showed a mode that the access to a register device was monitored. It is explanatory drawing which showed the bit device change monitoring function and the register device monitoring function. It is the image figure which showed the display of the trace result. It is explanatory drawing which showed the structure of the programmable controller. It is explanatory drawing which showed the sampling trace setting screen of the programming tool. It is explanatory drawing which showed the sampling trace operation | movement in the conventional CPU module. It is explanatory drawing which showed the sampling trace display screen of the conventional programming tool.

Explanation of symbols

11 CPU module 12 IO module 13 High-function IO module 14 Personal computer.

Claims (2)

Via a bus, a CPU module having a program execution process, a function for performing an IO data update process, a data trace function for recording data changes, and an IO module having an IO channel for input / output to / from the outside A programmable controller that can be traced by a programming tool that operates on a personal computer and that can be referred to in a chart format by the data trace function.
In a sampling trace setting screen by a programming tool operating on the personal computer, slot number specifying means for specifying a slot number of the IO module;
The bit device of the IO module designated by the slot number designation means is registered in the sampling device table, and the CPU module changes the device name and the value when the bit device value changes according to the sampling device table. Device change recording means for recording in the area;
A programmable controller comprising: When the slot number is specified by the slot number specifying means, the data trace function of the CPU module monitors the access to the register device of the IO module, and reads / writes when the access occurs, the number of access points, the access The programmable controller according to claim 1, wherein data is recorded in a sampling data area.

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