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(2) Transmission route cut-off
ERR LED
Flicker at 0.5 sec intervals
Check to ascertain if the transmission
route has been cut off.
station No.0 illuminated?
Replace the module with a spare one,
if available.
Notify your local authorized distributor
of it.
1 ) The data prevalent immediately prior to cut-off located in the receiving area assigned by other stations
will be saved when a cut-off occurs.
2 ) Check the transmission route (between the RXD and other station) displayed in bits 0 to 7 of the local
station's error information.
3 ) The transmission route cut-off error is not only triggered by the transmission route being cut off, it can
also be triggered by the power supplies to link modules that share duplicated stations numbers being
switched off simultaneously.
4 ) There are cases where a transmission route cut-off is detected by operating stations during cut-offs
caused by the power supplies to multiple stations being switched off simultaneously, resulting in
suspended link operations, but this will be automatically restored and operations resumed.
5 ) If the power supply to station No.0 (master station) is not switched on when the link is started up, the
other stations will detect a transmission route cut-off error and link operations will not commence. The
transmission route cut-off error will be cleared when the power to station No.0 (master station) is
switched on, and link operations will commence.
Is it cut off?
NO
Is the RUN LED on
YES
6-4
Chapter 6. Errors and error recovery
- Error information of own station : bit8 ON
- Cut-off station No. : bit0 to bit7
* The local station error information
(bits 0 to 7) are displayed in the cut-
off station No.. Check there.
YES
Connect the severed location.
NO
Switch the power supply to the entire
link system off and then on again.
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