Chapter 5 CPU Module
5-
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5.4.2 STOP mode
In this mode, programs are not operated.
1) Processing when the operation mode changes.
The output image area is cleared and output refresh is executed.
2) Operation processing contents
(1) I/O refresh is executed.
(2) Normal or abnormal operation and mounting conditions of the loaded module are checked.
(3) Communications service or other internal operations are processed.
5.4.3 PAUSE mode
In this mode, the program operation is temporarily stopped. If it returns to the RUN mode, the operation continues from the
state before the stop.
1) Processing when the operation mode changes
Data area and input image are not cleared and the operating conditions just before the mode change is maintain.
2) Operation processing contents
(1) I/O refresh is executed.
(2) Normal or abnormal operation and mounting conditions of the loaded module are checked.
(3) C ommunications service or other internal operations are processed.
5.4.4 DEBUG mode
In this mode, errors of a program are searched and the operation sequence is traced. Changing into this mode is only possible
in the STOP mode. In this mode, a program can be checked with examination on its execution state and contents of each data.
1) Processing when the operation mode changes
(1) Data area is initialized at the starting time of the mode change complying with the restart mode, which has been set on
the parameters.
(2) The output image area is cleared and output refresh is executed.
2) Operation processing contents
(1) I/O refresh is executed by one time every scan.
(2) Communications service or other internal operations are processed.
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