Mitsubishi Electric Melsec Q Series User Manual page 302

9
TROUBLESHOOTING
Error Code
(1) The DP-Slave is not able to respond.
(2) Because of current processing of a Class2 service,
the DP-Slave cannot handle the next service.
(3) The INITIATE service has not been executed.
E4DF
H
(4) A transmission timeout has occurred after execution of
the INITIATE service.
(5) A system switching occurred during service execution
in the redundant system.
E4E0 No response was received from the DP-Slave.
H
Any of the following functions are being executed from the
same DP-Master to the same DP-Slave.
E4E1
H
• Acyclic communication
• Alarm acquisition
E4E2
H
Hardware failure
E4E3
H
9
- 20 9.5 Error Codes
9.5.3 Error codes E400H to E4FFH (Error codes generated during acyclic communication)
Table9.6 Error codes E400H to E4FFH (Continued)
Error Description
Error codes E4DF
Action
(1) Check the PROFIBUS cable wiring status and start
completion status of the DP-Slave, and then retry.
For the start completion status of the DP-Slave, refer
to the manual for the DP-Slave.
(2) When Acyclic communications have been
continuously executed to the same DP-Slave, check
the execution intervals and retry.
For the execution intervals of the Acyclic
communication, refer to the manual for the DP-Slave.
(3) Retry after execution of the INITIATE service.
(4) Increase the set transmission timeout value of the
INITIATE service.
(5) After leaving it for a while, retry the execution from the
INITIATE service in the new control system.
Depending on the DP-Slave the time allowed for re-
execution varies.
Continue retrying until it is normally executed.
Check the DP-Slave status and retry.
Verify that the processing of the following functions is
completed, and retry.
• Acyclic communication
• Alarm acquisition
Please consult your local Mitsubishi representative.
to E4E3
H H