Chapter 4. CPU module
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4.4.2 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.
4.4.3 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 clear and input image clear are not executed 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) Communications service or other internal operations are processed.
4.4.4 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.