Panasonic AFPX-C30R User Manual page 407

13.2.7 A Communication Error has Occurred through RS485
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>.
13.2.8 A Communication Error has Occurred through RS232C
Condition: No communication with 1-channel type RS232C cassette (AFPX-COM1)
Procedure 1
Check if the receive data terminal of a connected device is connected to the SD and the send data
terminal is connected to the RD. Check if the SG is connected.
Procedure 2
1. Check if the CS signal is on.
2. When the "CS" of the communication cassette LED does not light, the CS signal is not on.
3. If the three-wire type is used, connect the RS signal and the CS signal of the communication cassette,
and turn the CS signal on.
Note) For COM1 only.
Procedure 3
Check that link areas do not overlap.
Procedure 4
When the RS232C is either one of the followings, check if "COM. cassette" is selected for "Port
selection".
1. When controlling the 1-channel type RS232C with 5-wire type.
2. When using the COM2 port with the 2-channel type RS232C
3. When using the COM2 port with the 1-channel RS485 and 1-channel RS232C.
4. When using the COM2 port with the Ethernet and 1-channel RS232C.
Procedure 5
Check that the baud rate is set to 9600 bps, 19200 bps or 115200 bps for the COM2 port of the 2-
channel type RS485. The settings of the system register and the cassette backside switch should be the
same.
Example: <Chapter 7 Communication Cassette>
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2-channel type RS232C cassette (AFPX-COM2)
1- channel RS485 + 1-channel RS232C cassette (AFPX-COM4)
Ethernet + 1-channel RS232C cassette (AFPX-COM5)
2-channel type RS485 cassette (AFPX-COM6)