Mitsubishi Electric MELSEC-Q Series User Manual page 24

No. Name
ERR. LED
ON
1)
Flashing
OFF
L ERR. LED
ON
Flashing at
regular
intervals
Flashing at
irregular
intervals
OFF
Station number
2)
setting switch
22
Indicates the error status of the master/local module.
The details of errors can be checked by using the following.
• CC-Link diagnostics (
• Detailed LED display status (SW0058) (
Any of the following errors has occurred.
• The error on all the stations was detected.
• The value outside the range is set for the station number setting switches or transmission speed/mode
setting switch of the master/local module.
• Two or more master stations are connected on the same line.
• Settings are incorrect.
• A cable is disconnected. Or a transmission path is affected by noise.
A data link faulty station was detected.
Or the station number set for a remote station is already in use.
Operating normally
Indicates the error status of a data link.
A data link error has occurred at the host station.
The settings of the switches 2) and 3) were changed when the power was on. (Note that the change of the
switch may not be detected at the time of error on all the stations.)
The communications are unstable due to the following reasons.
• A terminating resistor is not connected.
• The communications are affected by noise.
Operating normally
Sets the station number of the master/local module. (Default: 0)
Set the station numbers not used for other stations.
<Setting range>
• Master station: 0
• Local station: 1 to 64
• Standby master station: 1 to 64
If a number other than 0 to 64 is set, the ERR. LED turns on.
Application
Page 311, Section 11.4)
Page 351, Appendix 3.2)