3SPECIFICATIONS

POINT

MELSEC-Q

(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.

External device or converter

SDA

Send data

SDB

Output control input RDA

Receive

dataRDB

 

 

 

 

SDA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Send data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SDB

 

 

 

 

 

 

Q series C24

 

 

 

 

RDA

Output control input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receive

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RDB

 

 

 

 

 

 

 

data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SDA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Send data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SDB

 

 

 

 

 

 

Q series C24

 

 

 

 

RDA Output control input

 

 

 

 

 

 

 

 

 

 

 

 

Receive

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RDB

 

 

 

 

 

 

data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(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.)

3 - 10

3 - 10