Communication Error (Rs-485) - Panasonic FP0H User Manual

9.1.2 Communication Error (RS-485)

 Object
Product No.
AFP0HCCM1
AFP0HCCS1M1
 Situation
Connection or setting may be incorrect.
PROCEDURE
1. Check the system register setting.
Check that the setting for the allocated communication port No. is correct. When
an inter-PLC link is selected, check that there is no duplicate link area.
2. Check that the final unit is correctly connected.
Do not designate any unit other than those at both ends of the network as a
terminal unit.
3. Check to make sure that transmission cables securely connect between the
two (+) terminals and between the two (-) terminals of the units.
4. Check that the transmission cables are within the specifications range.
Use only one type of transmission cables. Do not mix more than one type.
Communication interface
RS-485 x 1 channel
RS-485 x 1 channel
RS-232C (3-wire type) ×1 channel
9.1 What to Do If an Error Occurs
Allocated communication port No.
Main unit Cassette
COM0 COM1
●
●
COM2
●
9-3