Troubleshooting By Symptom; Cyclic Transmission Cannot Be Performed - Mitsubishi Electric QJ71GF11-T2 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 master/local module.
If an error has occurred in the master/local module, identify the error cause using GX Works2.
( Page 426, 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 the network configuration settings of the master station, is a
slave station specified as a reserved station?
In the 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 the network configuration settings
of the master station match those set for corresponding slave
stations?
Do the station types set in the 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?
Are the transfer ranges for interlink transmission parameters
correct?
Are the source and destination modules correctly set for
interlink transmission parameters?
Is the station number of the master/local module duplicated with
any of the other stations?
If the above actions do not solve the problem, perform the following tests on the master/local module to check for
hardware error.
• Hardware test (
• Self-loopback test (
434
If the D LINK LED is flashing or off, perform troubleshooting.
(
Cancel the reserved station setting. (
Set RX/RY or RWw/RWr data for each slave station within the allowable
range. (
Correct station number (s).
Check the station types set in the 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 (
• "Assignment Image" window (
Correct the refresh parameters. Overlap of a refresh target device can
be checked in the "Assignment Image" window through GX Works2.
(
Check the interlink transmission parameters. Overlapping of a transfer
range can be checked in the assignment image in GX Works2.
(
Check the interlink transmission parameters. (
7.7)
Change the duplicated station number.
Page 64, Section 6.2.1)
Page 66, Section 6.2.2)
Action
Page 431, Section 12.3 (3))
Page 88, Section 7.3)
Page 103, Section 7.5 (1))
Page 103, Section 7.5 (1))
Page 88, Section 7.3)
Page 88, Section 7.3)
Page 103, Section 7.5 (1))
Page 113, Section