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MELSEC-Q
4 SETTING AND PROCEDURE BEFORE OPERATION
4.9 Offline Tests from GX Developer
The offline tests check the cable connection status using the network parameters of
GX Developer.
4.9.1 Forward loop/reverse loop test (Remote master station only)
The forward loop/reverse loop test checks the hardware of the network modules and
cables after all stations are connected with optical fiber cables. It also checks whether
the cables are connected between IN and OUT connections properly.
The following explains how to conduct the forward loop/reverse loop test:
(1) Setting the test mode
(a) Mode for performing the forward loop/reverse loop test on a system other
than the redundant system
When conducting the forward loop test, set the mode network parameter of
the station that will be executing the forward loop test 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"
with GX Developer and write the parameter setting to the CPU module.
Remote master station
Set