Troubleshooting For Device Access; Cyclic Transmission Cannot Be Performed - Mitsubishi Electric MELSEC SW1DNC-CCIEF-B User Manual

16.6

Troubleshooting for Device Access

The following shows the troubleshooting when an error has occurred in the network data link.
Page 154 Cyclic transmission cannot be performed
Page 155 Transient transmission cannot be performed

Cyclic transmission cannot be performed

The following explains the troubleshooting when the following symptoms have occurred and the cyclic transmission cannot be
performed.
• The output of the own station does not reach the accessed station.
• The change of the input from the accessed station does not reach the own station.
• An unexpected value is set to the link device.
When cyclic data are not delivered to the master or a slave station, check the following items.
Item
Is the D LINK LED of the master or slave station ON?
In "Network Configuration Setting" of the master station, is a
slave station specified as a reserved station?
In "Network Configuration Setting" of the master station, is "RX/
RY Setting" or "RWw/RWr Setting" for slave stations configured?
Do the station numbers set in "Network Configuration Setting" of
the master station match those set for corresponding slave
stations?
Do the station types set in "Network Configuration Setting" of the
master station match those set for the connected slave stations?
Is the station number of CC-Link IE Field Network board
duplicated with the station number of other station?
Is the board hardware operating normally?
If the problem is not solved by the above corrective actions, refer to the following section and contact us.
Page 166 Information Required for Inquiries
For the troubleshooting for the specific symptoms, refer to the following section.
An unexpected value is set to the specific link device
Check the following items.
Item
Is there a link error station?
Is the parameter assignment range correct?
Is the link device accessed using a user program?
Is the link device accessed from a sequencer in the network?
16 TROUBLESHOOTING
154
16.6 Troubleshooting for Device Access
Corrective action
If the D LINK LED is flashing or OFF, perform the troubleshooting. (Page 162 D LINK
LED is turned OFF or flashing)
Cancel the reserved station setting of the slave station. (Page 101 Network
configuration setting)
Set RX/RY or RWw/RWr data for each slave station within the allowable range. (Page
101 Network configuration setting)
Correct the station number(s).
Correct the station types set in "Network Configuration Setting" of the master station.
Change the duplicated station number.
Perform the board test. (Page 161 Board test)
Corrective action
Check the network condition by CC-Link IE Field Network diagnostics. (Page 164
Checking network status with CC-Link IE Field Network diagnostics)
Check the "Network Configuration Setting" of the master station. (Page 101 Network
configuration setting)
Check the argument of the communication function accessing to the link device.
Check the device range used in the sequence program.