Mitsubishi Electric Q06HCPU - Transmission from an External Device; Operating Status of the CPU Module

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CHAPTER 15 TROUBLESHOOTING
15
15.3 Checking for Functional Errors 15.3.8 Transmission from an external device
15.3.8 Transmission from an external device
If no response is returned from an external device, check the following items.
If communication cannot be performed even after taking the above actions, the possible cause is a hardware failure.
Please consult your local Mitsubishi representative.
15.3.9 Operating status of the CPU module
If it takes time for the CPU module to switch the operating status, check the following items.
If communication cannot be performed even after taking the above actions, the possible cause is a hardware failure.
Please consult your local Mitsubishi representative.
Check item Corrective action
More than one external device is communicating with the
CPU module.
• Adjust the service processing time in parameter.
• Adjust the value of communication time check period or
number of retries.
• Check the condition of the cables, connected device
(personal computer), and CPU module.
The data logging function is used.
Refer to the troubleshooting section of the following manual.
QnUDVCPU/LCPU User's Manual (Data Logging
Function)
Check item Corrective action
The data logging function is used.
Refer to the troubleshooting section of the following manual.
QnUDVCPU/LCPU User's Manual (Data Logging
Function)