Specifications

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3.7.2 Forward loop/reverse loop test
This test checks the cables after all stations are connected with optical fiber cables.
It also checks whether the hardware of the network modules and the cables are
connected IN and OUT connections properly.
(1) Setting the test mode
Set the mode network parameter to "Forward loop test" with GX Developer and
write the parameter setting to the CPU module. Set the mode for all other stations
than the testing station to "Online".
When conducting the reverse loop test, set the mode network parameter of the
station that will be executing the reverse loop test to "Reverse loop test".
Station to execute the forward loop test Other stations
Set
Set
(2) Starting the test
Set the STOP/RUN switch to the STOP position and reset the CPU with the
RESET/L. CLR switch.
Perform this operation on the station to be tested first, then on the station to
execute the test.
5
Center RESET
CPU
module
Center