Mitsubishi Electric Melsec QJ71LP21 - Forward Loop;Reverse Loop Test (Optical Loop System Only)

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MELSEC-Q
4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION
4.7.2 Forward loop/reverse loop test (optical loop system 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 OUT and IN connections properly.
The following explains how to conduct the forward loop/reverse loop test:
(1) Setting the test mode
(a) Mode setting for the forward loop/reserve loop test on stations in 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.
Station to execute the forward loop test Other stations
Set
Set