Panasonic AFPX-C30R User Manual page 408

13.2.9 A Communication Error has Occurred through RS422
Condition: No communication with 1-channel type RS232C/RS422 cassette (AFPX-COM3)
Procedure 1
Check to make sure the transmission cables have been securely connected between the two (+)
terminals and two (−) terminals of the units, and that the final unit has been correctly connected.
Procedure 2
Check if the transmission cables are within the specifications range. 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.
Example:
For the specifications range of the transmission cables, <5.8.1 Selection of Transmission Cables>.
13.2.10 Expansion Unit does not Operate
Procedure 1
Check if the terminal setting is specified for the expansion unit.
Check if the terminal setting is specified for multiple expansion units.
Procedure 2
Check if the expansion FP0 adapter is installed at the last position.
When the expansion FP0 adapter is installed at the last position, the terminal setting for other expansion
unit is not necessary.
Procedure 3
Check if the power supply has turned on and off in a short time such as momentary power failure.
There is a possibility that the expansion unit has not been recognized due to the occurrence of
momentary power failure.
Turn off and on the power supply again.
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