Chapter 3 Before positioning
3- 30
3.2.2 Relationship between positioning parameter and dedicated K area
XGB built-in positioning function executes the positioning control by using parameter and K area
dedicated for positioning. Here describes relationship between positioning parameter and K area.
Internal memory configuration related with XGB built-in positioning is as follows.
< Relationship between positioning parameter and K area >
•XGB has a built-in parameter area to save operation data and parameter written in the XG5000 and
a dedicated K area for use of real positioning operation.
•If writing the embedded positioning parameter and operation data, the downloaded data is saved in
the built-in parameter area permanently. And in case of reading, it reads built-in parameter area.
•XGB executes the initialization by copying the parameter and operation data saved in the built-in
parameter area to K area dedicated for positioning.
(1) In case of restarting after power cut
(2) In case of changing PLC operation mode
(3) In case of restarting PLC by reset command
•XGB built-in positioning is executed by using data of K area and Flags that indicate the current
operation status and monitoring data are displayed in the K area. So the user can change operation
data easily by changing the K area data
•In order to preserve the current K area data, K area data should be applied to built-in parameter
area by using application command (WRT command)
•For detail list of K area, refer to A2.2.
Remark
•After changing K area and not using WRT instruction, if restarting after power cut or
changing PLC operation mode, K area is initialized.
•For more detail of WRT instruction, refer to 5.2.21.
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