NAiS FP Series User Manual page 248

FPΣ 12.2 Troubleshooting
12.2.7 If a Transmission Error has Occurred
Procedure 1
Check to make sure the transmission cables have been securely connected between
the two (+) terminals and the two (–) terminals of the units, and that the final unit has
been correctly connected.
Procedure 2
Check to see if the transmission cables are within the specifications range, referring to
page 7 - 11.
At this point, make sure all of the cables in the link are of the same type, and that multiple
types of cables are not being used.
Do not designate any unit other than those at both ends of the network as a terminal
station.
Procedure 3
Check that link areas do not overlap.
12 - 11