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Hardware Installation
Wiring Diagram
The 24V digital signal is needed because the RS232C interface of the Panasonic
PLC does not support handshake or modem control lines. The connect status
message NO CARRIER (via RS232C) cannot be reliably detected during a data
communication connection.
2.7.3 RS232C Cables
RS232C data interface
Pin
Sub-D 9 female
5
1
9
6
PLC-Modem
For the connection to the PLC (especially the Tool port), automatic baud rate detection should
be disabled using AT*W (see "Command Tables" on page 68).
26
Name
Direction
1
DCD
→
2
RXD
→
3
TXD
←
4
DTR
←
5
GND
→
6
DSR
→
7
RTS
←
8
CTS
→
→
9
RI
FP Modem-EU Technical Manual
Description
Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
System Ground
Data Set Ready
Request To Send
Clear To Send
Ring Indicator
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