Operation For Cpu Module Stop Error - Mitsubishi Electric MELSEC Q Series User Manual

3.10 Operation for CPU module stop error

The entire system will behaves differently depending whether a stop error occurs in CPU No.1 or any of CPU No.2 to
No.4 in the multiple CPU system.
(1) When a stop error occurs at CPU No.1
A "MULTI CPU DOWN (error code: 7000)" error occurs at the other CPUs and the multiple CPU system will be
halted when a stop error occurs at the CPU No.1 (
(2) When a stop error occurs at CPU other than No.1
Whether the entire system is halted or not is determined by the multiple CPU setting's "Operating Mode" setting
when a stop error occurs in a CPU other than CPU No.1.
The default is set for all CPUs to be stopped with a stop error.
When you do not want to stop all CPUs at occurrence of a stop error in a specific CPU module, remove the check
mark that corresponds to the CPU No. so that its error will not stop all CPUs.
Operation mode
All station stop by stop error of PLC 'n':
"All station stop by stop error of PLC 'n'" setting
All station stop by stop error of PLC 'n':
"Not all station stop by stop error of PLC 'n''" setting
(a) When "All station stop by stop error of CPU 'n'" is set
When a stop error occurs in the CPU module for which "All station stop by stop error of CPU 'n' " has been set,
a "MULTI CPU DOWN (error code: 7000)" error occurs for the other CPU modules and the multiple CPU
system will be halted.
( POINT on the next page for details.)
(b) When "Not all station stop by stop error of CPU 'n'" is set
When a stop error occurs in the CPU module for which " All station stop by stop error of CPU 'n' " has not been
set, a "MULTI EXE. ERROR (error code: 7010)" error occurs in all other CPUs but operations will continue.
Point on the next page for details)
Figure 3.35 Operation setting for stop error
CHAPTER3 CONCEPT FOR MULTIPLE CPU SYSTEM
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