Mitsubishi Melsec-L Series User Manual page 63

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POINT
(1) When the external device and the C24 connected in n:1 and m:n
configurations
When the send signal of each device is connected as shown below, if the
"Output control input" is turned ON at two or more devices, the relevant
devices output (send) data at the same time.
For the external device to transfer data normally:
• "Output control input" must be turned ON only when sending data.
• "Output control input" must be turned OFF when not sending data.
The C24 side automatically controls the output control input.
External device or converter
Send data
Output control input
Receive
data
(2) When two interfaces are in linked operation (refer to Section 7.3.5) in the C24,
the transmission time for one character becomes equal to the hardware gate
off time of the C24.
(The C24 turns OFF the gate after the one-character send time.)
SDA
SDB
RDA
RDB
SDA
SDB
Output control input
RDA
RDB
SDA
SDB
Output control input
RDA
RDB
6 SETTING AND WIRING
Send data
C24
Receive
data
Send data
C24
Receive
data
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