Chapter 5 CPU Module
5-
15
5.4 Operation Modes
The CPU module operates in one of the four modes - the RUN, STOP, PAUSE and DEBUG mode. The following descri
bes the PLC operation processing in each operation mode.
5.4.1 RUN mode
In this mode, programs are normally operated.
1) Processing when the operation mode changes.
Initialization of data area is executed when the first scan starts.
(1) If the PLC is in the RUN mode when applying the power:
(2) If the operation mode has been changed into from the STOP mode into the RUN mode : the initializati
on is executed complying with the restart mode set. (cold I warm I hot)
(3) The possibility of execution of the program is decided with check on its effectiveness.
2) Operation processing contents
I/O refreshes 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.
The first scan start in the RUN mode
Initialize data area according to the preset
restart mode.
Check the program and determine it can be
executed or not.
Execute input refresh
Execute programs and tasks
Check the availability of expansion units
Execute communication and internal service
Execute output refresh
Operation mode is changed?
No
Yes
Operate with new mode
Содержание MASTER-K80S
Страница 27: ...Chapter 4 Names of Parts 4 4 1 3 30 points base unit 4 1 4 40 points base unit 4 1 5 60 points base unit...
Страница 66: ...Chapter 6 Input and Output Modules 6 3 30 point base unit 4 40 point base unit DC24V DC24V DC24V...
Страница 67: ...Chapter 6 Input and Output Modules 6 5 60 point base unit DC24V DC24V...
Страница 206: ...Chapter 8 Communication Function 8 63 You can see the frame list which is designated Click OK button...