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Chapter 5 Power Supply / CPU
5-20
5.5.2 STOP mode
In this mode, programs are not operated.
1) Processing when the operation mode is changed.
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.
5.5.3 PAUSE mode
In this mode, the program operation is temporarily stopped. If it returns to the RUN mode, the operation continu
es from the state before the stop.
1) Processing when the operation mode changes
Data registers and input image areas are not cleared and the operating conditions just before the mode chang
e is maintained.
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.
5.5.4 DEBUG mode(Standard type only)
In this mode, errors of a program are searched and the operation sequence is traced. Changing into this mode
is only possible from the STOP mode. In this mode, a program can be checked with examination on its executi
on 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 input refresh is executed.
2) Operation processing contents
(1) I/O refresh is executed.
(2) Debugging process is executed complying with setting. I
(3) I/O refresh is executed after debugging process has executed to end of the program
(4) Normal or abnormal operation and mounting conditions of the loaded module are checked.
(5) Communications service or other internal operations are processed