Mitsubishi MELSEC LJ71C24, User Manual

Page: 63 / 428

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6 SETTING AND WIRING
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.
SDA
SDB
RDA
RDB
C24
SDA
SDB
RDA
RDB
C24
Receive
data
Send data
SDA
SDB
RDA
RDB
Output control input
External device or converter
Receive
data
Send data
Output control input
Receive
data
Send data
Output control input
(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.)