Mitsubishi 00JCPU User Manual page 329

6.27 Memory Check Function
This function checks whether data in the memories of the CPU module are changed or not due to such as
excessive electric
Program memory check
Program memory
Specified steps
Specified steps
Q12PHCPU,
Q12PRHCPU:
Specified steps
124K steps
Q25PHCPU,
Q25PRHCPU:
252K steps
Specified steps
Repeat execution
(1) Data to be checked
When the CPU module is set from STOP to RUN or END processing is performed, the data in execution in the
program memory are compared with data, such as programs and parameters, when they were written to the
program memory of the CPU module.
If they do not match, the CPU module judges that the data in the program memory have been changed and
detects a stop error, "RAM ERROR" (error code: 1106).
Note30
Note6.30
Basic
The Basic model QCPU and High Performance model QCPU do not support the memory check function.
When using the function for the Process CPU, check the versions of the CPU module and GX Developer. (
Appendix 2.3)
noise.Note30
Base data
Check
Processing time required
for program memory check
Figure 6.100 Overview of memory check function
High
Process
performance
Note6.30
Execution of program memory check 1)
Execution of program memory check 2)
Execution of program memory check 3)
END END 0 END
Scan time
CHAPTER6 FUNCTIONS
Execution of program memory check n
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