Panasonic FPS Series, User Manual

Page: 176 / 332

FP Σ User's Manual
8.2 Communication Cassettes
159
8.2 Communication Cassettes
There are several types of communication cassettes, each having a particular field of
application (see page 163):
Types
•
FPG-COM1: 1-channel RS232C type (see page 159)
• FPG-COM2: 2-channel RS232C type (see page 160)
• FPG-COM3: 1-channel RS485 type (see page 160)
•
FPG-COM4: 1-channel RS485 and 1-channel RS232C combination type (see page
161).
8.2.1 Communication status LEDs
The labeling of the communication status LEDs on the CPU refers to the 2-channel RS232C
type communication cassette (FPG-COM2). For all other types, the following table applies:
LED FPG-COM1 FPG-COM2 FPG-COM3 FPG-COM4
S SD SD SD RS485: SD
COM1
R RD RD RD RS485: RD
S RS SD — RS232C: SD
COM2
R
CS RD — RS232C: RD
SD: Send Data (output) RS: Request to Send
RD: Receive Data (input) CS: Clear to Send
The LED flashes while communication is taking place and goes out when there is no
communication.
8.2.2 FPG-COM1: 1-Channel RS232C Type
This communication cassette is a 1-channel unit with a five-wire RS232C port. RS/CS control
is possible.
Terminal layout
Pin Name Signal direction Port
SD
Send Data
PLC
→
External device
RD
Receive Data
PLC ← External device
RS
Request to Send
PLC → External device
CS
Clear to Send
PLC ← External device
SG
Signal Ground —
COM 1
RS (Request to Send) can be controlled by the SYS1 instruction.
Data cannot be sent unless the pin CS (Clear to Send) is on. When connecting to a three-wire
port, short-circuit the RS and CS pins.