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Using Remote Fiber Diagnosis:
Set DIP switch SW8 to the ON position on any ICF-1280I converter and
see the
Ready
LED status. A flashing green
Ready
LED indicates that the
Fiber Diagnosis has finished. The
Fault
LED indicates the location of the
fiber connection abnormality. The
P1
or
P2
LED indicates which side (Tx
or Rx) is causing the problem.
The
Fault
LED will shine a steady red to indicate an adjacent fiber
connection error, or flash red to indicate a non-adjacent fiber connection
error. If there are no fiber connection errors in the entire topology, the
related LEDs will shine green or remain OFF. If the fiber connection error
is adjacent to the converter, the status will also be indicated by the
P1
(Port 1) or
P2
(Port 2) LEDs. A flashing red light on
P1
(or
P2
) means that
the Rx fiber cable connected to this port is broken. Similarly, a solid red
light on
P1
(or
P2
) means that the Tx fiber cable in this port is broken. If
the fiber connection error is not adjacent to the converter (i.e., the fiber
cables connected to this converter are working properly), the
Fault
LED
will flash red. As a result, you should run Remote Fiber Diagnosis on every
other (second) converter in the topology to recursively troubleshoot the
problem. Further descriptions and troubleshooting can be found in the
Troubleshooting
table.
Redundant Ring
The ICF-1280I series converters can connect PROFIBUS devices in a
redundant ring topology. Use the DIP switch to configure all the ICF-
1280I converters to
Redundant Ring
mode. When a PROFIBUS master
transmits a signal from one converter to the PROFIBUS slave devices, this
signal will travel to all the converters around the ring until it returns to the
original converter and terminate.
How to form a redundant ring topology:
To form a redundant ring topology, connect the
Tx Port (Port 1)
on the
first ICF-1280I converter to the
Rx Port (Port 2)
on the following
converter. Then, connect the
Tx Port (Port 2)
on the first ICF-1280I
converter to the
Rx Port (Port 1)
on the preceding converter. Similarly,
connect the
Rx Port (Port 1)
on the first ICF-1280I converter to the
Tx
Port (Port 2)
on the following converter. Then, connect the
Rx Port
(Port 2)
on the first ICF-1280I converter to the
Tx Port (Port 1)
of the
preceding converter.
