Specifications

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3.8.3 Station order check test (optical loop system only)
This test checks the connected station numbers in the optical loop system.
The following connection orders can be checked by the loop status (displayed on the
station order check test result screen. See the monitor screen below.) when this test is
conducted.
Loop status Display
Forward and reverse loops
The station numbers connected in the direction of the forward loop from the
host as well as the station numbers connected to the direction of the reverse
loop from the host.
Forward loop
Only the station numbers connected in the direction of the forward loop from
the host
Reverse loop
Only the station numbers connected in the direction of the reverse loop from
the host
Loop back
Only the station numbers connected in the direction of the forward loop from
the host
For example, in the following system, when the station order check test is conducted
by the peripheral device connected to station number 1, the monitor screen shown
below is displayed to verify that a loopback is being executed between station numbers
3 and 5 that are connected in the direction of the forward loop.
Forward loop
direction
IN OUT IN OUT
GX Developer
IN OUT
INOUT INOUT
Reverse loop
direction
Station
No.1
Station
No.2
Station
No.3
Station
No.4
Station
No.5
Loopback
Loopback Fault
y
station