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During the loop test, data link stops on all stations.
7. Check the test result with LEDs of the master
station (safety station). D LINK LED turns on when
the test is completed.
• When completed
The ×10 and ×1 LEDs turn off.
• When failed
Any one of the ×10 and ×1 LEDs turns on, and the ERR.
LED turns on. Error details can be specified depending
on the lighting status of ×10 and ×1 LEDs.
Identify the error location through GX Developer or
link special register (SW), and take actions.
( Page 72, Section 6.4.1 (2))
8. When the loop test is completed, slave stations
will be in online mode.
Set the master station (safety station) to "Online
(Normal Mode)" or "Online (High Speed Mode)"
through the network parameter.
RUN
SD
ERR.
MST
D LINK
RD
L ERR.
1
2
4
8
MODE
S
T
N
O
.
.
1
2
4
8
1
RUN
SD
ERR.
MST
D LINK
RD
L ERR.
1
2
4
8
MODE
S
T
N
O
.
.
1
2
4
8
1
100
10
1
100
10
1
: ON
When completed
: Flashing
: ON
When failed
: Flashing
1
1
2
4
8
1
2
4
8
10
Master station duplication
Station No. duplication
Invalid station No.
Reserved station specification error
(A station that exists on the network is set
as a reserved station in the master station.)
All stations faulty
Inconsistent number of total slave
stations
Station type setting error
Loopback stations exist.
Select "Online
(Normal Mode)"
or "Online
(High Speed Mode)".
Write the network
parameters to the
Safety CPU module.
or Power OFF ON