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MELSEC-Q
3 SPECIFICATIONS
POINT
(1) When the external device and the Q series 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.
SDA
SDB
RDA
RDB
Q series C24
SDA
SDB
RDA
RDB
Q series 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 the Q series C24 is used, if operation of the two interfaces is linked (see Section 4.5.2 (2)), the
time to send one character becomes the Q series C24 H/W gate OFF time.
(The Q series C24 turns OFF the gate after the one-character send time.)