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CHAPTER 9 TROUBLESHOOTING
9
9.4 Troubleshooting by Symptom
9.4.1 Cyclic transmission cannot be performed
9.4 Troubleshooting by Symptom
This section describes troubleshooting methods by symptom.
● If the problem is not solved by troubleshooting by symptom
Perform a unit test on the Ethernet adapter module to check for hardware failure. ( Page 57, Section 6.3)
9.4.1 Cyclic transmission cannot be performed
When cyclic data are not delivered to other stations or not received from the master station, troubleshoot the problem
as shown below.
If the above does not solve the problem, check the link device assignment of the master station or the refresh target
devices set in the refresh parameter setting for any error. ( User's manual for the master/local module used)
9.4.2 Transient transmission cannot be performed
(1) Transmission from a master or local station to the Ethernet adapter module
If transient transmission to the target station is not available, check if the network number and station number of
the Ethernet adapter module are correctly set. ( Page 186, Section 10.3.2)
If they are set on the Ethernet adapter module, troubleshoot the problem referring to the master/local module
troubleshooting section. ( User's manual for the master/local module used.)
(2) Transmission from GX Works2 and through the Ethernet adapter module
Troubleshoot the problem as shown below when MELSOFT connection from GX Works2 through the Ethernet
adapter module is not possible.
Checking Action
Is the D LINK LED on the Ethernet adapter module on?
If the D LINK LED is flashing or off, troubleshoot the problem by
checking the LEDs. (
Page 144, Section 9.3)
Is the switch of the Ethernet adapter module set to "RUN"? Set the switch of the Ethernet adapter module to "RUN."
Is the RUN LED on the Ethernet adapter module on?
If the RUN LED is flashing or off, troubleshoot the problem by checking
the LEDs. (
Page 144, Section 9.3)
Checking Action
Is the D LINK LED on the Ethernet adapter module on or
flashing?
If the D LINK LED is off, troubleshoot the problem by checking the LEDs.
(
Page 144, Section 9.3)
Are the settings in "Transfer Setup" correct?
Correct the settings in "Transfer Setup" of GX Works2.
(
Page 105, Section 7.3)
Does the network No. of the Ethernet adapter module match
that of the connected network?
Change the network No. of the Ethernet adapter module to that of the
connected network.