642
37 FUNCTIONS
37.4 System Consistency Check
Errors during memory copy
When the memory copy is completed with an error, the MEMORY COPY LED of the control system turns off and that of the
standby system flashes (at 1s intervals). In this case, the memory copy has not been normally executed on the standby
system CPU module.
After checking the error code of memory copy stored in SD1654 (Memory copy completion status) and eliminating the error
cause, execute the memory copy again. ( Page 833 List of Special Register Areas)
37.4 System Consistency Check
This function checks whether the system configurations and files in the CPU modules are the same between the control
system and the standby system.
The following table lists the items to be checked in the system consistency check.
Number
in figure
Item Description Reference
(1) File Parameter file, program file, and other files Page 644 File
(2) Operating status Operating status of CPU module (RUN/STOP/PAUSE) Page 645 Operating status
(3) Mounting status of main base unit CPU module and other modules mounted on the main base unit Page 645 Mounting status of
main base unit
(4) SD memory card Installing status of the SD memory card and status of the write protect
switch
Page 646 SD memory card
(5) Mode of safety control Safety operation mode Page 646 Safety operation
mode
(3) (3)
(4)
(4)
(1)
(2)
(1)
(2)
(5) (5)
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