Considerations For Using The Programmable Controller Cpu Monitoring Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

6.4
Considerations for Using the Programmable
Controller CPU Monitoring Function
Influence on the cycle time
The cycle time will be affected by the following factors.
Keep these in mind when setting the cycle time.
• When the programmable controller CPU is accessed by a module other than C24.
• When a data communication function other than the programmable controller CPU monitoring function is used.
• When transmission interruption occurs by DTR/DSR control.
Mixing of fixed cycle send and condition match send
Both of the fixed cycle send and the condition match send cannot be designated together for the same interface.
Target CPU module
Only the CPU module on the host station can be the target for the programmable controller CPU monitoring function.
Registration during operation
A new programmable controller CPU monitoring registration cannot be performed while the programmable controller CPU
monitoring function is in operation.
• Perform the new programmable controller CPU monitoring registration after canceling the programmable controller CPU
monitoring.
• If the programmable controller CPU monitoring registration is performed without canceling the monitoring, an error will
occurs.
Before performing the programmable controller CPU monitoring registration with Engineering tool, set the CPU module in
the STOP state, and then restart the CPU module.
Error during operation
While the programmable controller CPU monitoring function is in operation, even if an error occurs in transmission of the CPU
module monitoring results or reading of data from the CPU module, the programmable controller CPU monitoring function
operation will not stop.
System configuration
The programmable controller CPU monitoring function can be used when the system configuration is in a 1:1 basis.
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6.4 Considerations for Using the Programmable Controller CPU Monitoring Function