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6.2.2 Self-loopback test
Self-loopback test checks the communication circuit of the master/local module.
When conducting the self-loopback test, use a normal Ethernet cable. ( Page 56, Section 5.2)
1. Mount the master/local module on the safety
base unit, and connect GX Developer to the
safety CPU module.
2. Set network parameters in GX Developer as
shown in the figure to left.
Project data list [Parameter] [Network
param] [Ethernet/CC IE/MELSECNET]
3. Write the network parameters set in GX
Developer to the safety CPU module.
[Online] [Write to PLC]
4. Connect PORT1 and PORT2 of the master/local
modules with an Ethernet cable. ( Page 64,
Section 6.3)
5. Reset the safety CPU module or power off and on
the system.
Select "Self-loopback test".
Select one from the followings:
"CC IE Field (Master station [Safety])",
"CC IE Field (Local station [Safety])",
or "CC IE Field (Local station)".
Ethernet cable
or powering off on