Chapter 4 CPU Function
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1) Processing when the operation mode is changed.
Initialization of data area is executed when the first scan starts and The possibility of exec
ution of the program is decided with check on its effectiveness.
2) Operation processing contents
I/O Refresh and program operation are executed.
(1) Interrupt programs are executed with the detection of their start-up conditions.
(2) Normal or abnormal operation and mounting conditions of the loaded module are checked.
(3) Communications service or other internal operations are processed.
4.4.2 STOP mode
In this mode, program are not operated. It can transfer the program via KGLWIN in Remote 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.
4.4.3 PAUSE mode
In this mode, the program operation is temporarily stopped. If it returns to the RUN mode, the o
peration continues 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 t
he mode change 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.
4.4.4 Operation mode change method
1) Operation mode change method
The following method is used to change the operation mode.
(1) Change by the mode key of the PLC option card for iS7.
(2) Change by the KGLWIN connected with communication port of PLC option card’s CPU.
(3) Change by the ‘STOP’ instruction, during program execution.
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