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8 OTHER FUNCTIONS
Registration execution
8.9 Controlling the RS-232-C signal
8.9.1 Correspondence of RS-232-C control signal and remote input/output signal
(b) When using the dedicated command with the QCPU (Q mode)
/ QnACPU
The status of the RS-232-C interface signals stored in the R2 buffer memory can be
read and the output controlled.
This is carried out with the remote input/remote output (RX/RY).
The correspondence of the RS-232-C interface control signals and the remote
input/output signals (RX/RY) is shown below.
Remote input/output
signal
RXn9
Input signal
RXnA
RXnB
RYn9
Output signal
RYnA
The area between the RS-232-C control signal and input/output signal (RX/RY) is
updated every 100ms.
Refer to section 3.3 for details on each RS-232-C signal.
RS-232-C control
signal
CS (CTS) signal
The ON/OFF state of the input control signal
DR (DSR) signal
is reflected on the corresponding remote input
signal (RXn9 to RXnB).
CD signal
RS (RTS) signal
The ON/OFF state of the remote output signal
is reflected on the corresponding control
ER (DTR) signal
signal output.
8 - 22
MELSEC-A
Write "0" in
to
R2 1C0
H
register (default value is "4")
Set EEPROM function
request (RYn7)
Reset EEPROM function
request (RYn7)
Details
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Troubleshooting
