Troubleshooting By Symptom; Cyclic Transmission Cannot Be Performed - Mitsubishi Electric MELSEC-Q Series User Manual

12.4 Troubleshooting by Symptom

Troubleshooting methods are described by symptom. Perform these troubleshooting if data
link cannot be performed even though no error is detected in the Simple Motion module.
If an error has occurred in the Simple Motion module, identify the error cause using GX
Works2.
(Refer to Section 12.2.)

12.4.1 Cyclic transmission cannot be performed

The following lists the actions to be taken if cyclic data are not delivered to the master or a
slave station.
Check item
Is the D LINK LED of the master or slave station on?
In "Network Configuration Settings" of the master station, is a
slave station specified as a reserved station?
In "Network Configuration Settings" of the master station, is
"RX/RY Setting" or "RWw/RWr Setting" for slave stations
configured?
Do the station numbers set in "Network Configuration
Settings" of the master station match those set for
corresponding slave stations?
Do the station types set in "Network Configuration Settings" of
the master station match those set for the connected slave
stations?
Are the refresh parameters set within correct ranges?
Is any refresh target device in the refresh parameter window
overlapped with that of another network module?
Is the station number of the Simple Motion module duplicated
with any of the other stations?
If the D LINK LED is flashing or off, perform troubleshooting. (Refer to
Section 12.3 (1).)
Cancel the reserved station setting. (Refer to Section 7.4.)
Set RX/RY or RWw/RWr data for each slave station within the allowable
range. (Refer to Section 7.4.)
Correct station number (s).
Check the station types set in "Network Configuration Settings" of the
master station.
Correct the refresh parameters. Link devices and link refresh assignment
can be confirmed in either of the following.
• "Network Configuration Settings" window (Refer to Section 7.4.)
• "Assignment Image" window (Refer to Section 7.6 (2).)
Correct the refresh parameters. Overlap of a refresh target device can be
checked in the "Assignment Image" window through GX Works2. (Refer to
Section 7.6 (2).)
Change the duplicated station number.
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Chapter 12 TROUBLESHOOTING
Action