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(4) Precautions for wiring RS-232 cables
Precautions for wiring RS-232 cables are shown below.
(a) Ground the RS-232 Cable shield to a single point.
(b) Use any of the connector shells indicated in (2) on the C Controller
module side of the RS-232 cable.
(c) Connect the external device according to its specifications.
(d) For the bending radius of the connection cable, refer to Chapter 6.
(e) Do not short the FG signal and SG signal lines of the RS-232 connection
cable.
When the FG signal and SG signal lines are connected inside the
external device, do not connect the FG signal line to the C Controller
module.
POINT
In RS-232 connection, a communication error may occur due to noise
generated from the devices other than the C Controller system, depending on
the installation environment.
In the environment where cables are susceptible to noise, include the retry
processing in the user program.
Summary of Contents for Q06CCPU-V-H01
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