12.RS-485 COMMUNICATION INTERFACE(OPTION)
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12.
RS-485 COMMUNICATION INTERFACE(OPTION)
12-1. Communication Specifications
- Specifications
Signal level
Based on RS-485
Transmitting distance
Approx 1km
Transmitting method
Asynchronous
，
Full duplex
Transmitting speed
1200
，
2400
，
4800
，
9600 or 19200bps Selectable
Bit configuration
Start
1bit
Character length
7 or 8bits Selectable
Stop
1 or 2bits Selectable
Parity
None,Odd or Even Selectable
Terminator
CR+LF/CR Selectable
Code
ASCII
- Connector Pin Assignmen
t
12-2. RS-485 connection
1.Connection of transmitting and receiving lines
①
4-wire connection
Set the communications mode of the F370 to “4-wire.”
Connect the “SD” (sending side) of the equipment on the other end (master), such as a
programmable controller, to “RD” (receiving side) of the F370 (slave), and “RD” of the
master to “SD” of the F370.
・
MARK
（
OFF
）
V
A
-V
B
< -0.2V
・
SPACE
（
ON
）
V
A
-V
B
> 0.2V
A
－
B
＋
A
－
B
＋
SD
RD
SG
RS-485
