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File
Whether both systems have the same files is checked.
The following table shows whether or not to perform the check on each file type.
: Checked, : Not checked, : Storage not possible
File type
*1
Program
*1
FB file
CPU parameter
System parameter
Module parameter
Module extension parameter
Module-specific backup parameter
Memory card parameter
Device comment
Initial device value
Global label setting file
Initial label value file
*2
File register
Event history
Device data storage file
General-purpose data
Data logging setting file
Remote password
*1 The reserved area for online change and program restoration information write status are also checked. ( Page 106 Configuration of
a program file, Page 942 Program Restoration Information Write Selection)
*2 Whether a file is stored or not is checked. The file contents are not checked.
*3 The file will not be checked at the timing on when SD memory cards are inserted during operation.
Operation of when a mismatch is detected
If a mismatch between the files is detected, a stop error occurs on the standby system CPU module.
Set the CPU modules of both systems to have the same files with either of the following methods.
• Writing files to both systems
• Executing the memory copy from the control system to the standby system for storing the same files in both systems (
Page 468 Memory Copy from Control System to Standby System)
Initial global label value file
Initial local label value file
Common setting file
Individual setting file
Check target memory
Built-in memory of CPU
module
28.5 System Consistency Check
*3
SD memory card
28 FUNCTIONS
477
28
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- Part 1 Cpu Module Operation
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