154
16 TROUBLESHOOTING
16.6 Troubleshooting for Device Access
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.
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
Corrective action
Is the D LINK LED of the master or slave station ON?
If the D LINK LED is flashing or OFF, perform the troubleshooting. (
LED is turned OFF or flashing)
In "Network Configuration Setting" of the master station, is a
slave station specified as a reserved station?
Cancel the reserved station setting of the slave station. (
In "Network Configuration Setting" of the master station, is "RX/
RY Setting" or "RWw/RWr Setting" for slave stations configured?
Set RX/RY or RWw/RWr data for each slave station within the allowable range. (
101 Network configuration setting)
Do the station numbers set in "Network Configuration Setting" of
the master station match those set for corresponding slave
stations?
Correct the station number(s).
Do the station types set in "Network Configuration Setting" of the
master station match those set for the connected slave stations?
Correct the station types set in "Network Configuration Setting" of the master station.
Is the station number of CC-Link IE Field Network board
duplicated with the station number of other station?
Change the duplicated station number.
Is the board hardware operating normally?
Perform the board test. (
Item
Corrective action
Is there a link error station?
Check the network condition by CC-Link IE Field Network diagnostics. (
Checking network status with CC-Link IE Field Network diagnostics)
Is the parameter assignment range correct?
Check the "Network Configuration Setting" of the master station. (
Is the link device accessed using a user program?
Check the argument of the communication function accessing to the link device.
Is the link device accessed from a sequencer in the network?
Check the device range used in the sequence program.
Summary of Contents for MELSEC Q80BD-J71GF11-T2
Page 2: ......
Page 6: ...4 Disposal Precautions CAUTION When disposing of this product treat it as industrial waste ...
Page 118: ...116 12 MONITORING MEMO ...
Page 140: ...138 14 MELSEC DATA LINK LIBRARY MEMO ...
Page 142: ...140 15 PROGRAMMING 15 1 Precautions on Programming MEMO ...
Page 243: ...241 I U Utility 83 ...
Page 247: ......