Processing Of Transmitted/Received Data When Simultaneous Transmissions Occur - Mitsubishi Electric MELSEC iQ-R Series User Manual

Processing of transmitted/received data when simultaneous
transmissions occur
The following shows the C24 communication data processing based on the settings of 'Send data' and 'Receive data' with
Engineering tool by using the examples.
For details on the time check timer 1 (response monitoring time) shown in the figures, refer to the following section.
Page 231 Response Monitoring Time (timer 1) Setting
Send data: Enable, Receive data: Enable
Target device
C24
Send data: Disable, Receive data: Disable
Target device
C24
E
N
Q
Ò-1
Send data: Enable, Receive data: Disable
Target device
C24
E
N
Q
Ò-1
Send data: Disable, Receive data: Disable
Target device
C24
E
N
Q
Ò-1
Ó-1
E
N Arbitrary data
Q
E
Arbitrary data
N
Q
Ò-1
Ó-1
E
Arbitrary data
N
Q
Arbitrary data
Ó-1
E
N
Arbitrary data
Q
Arbitrary data
Ó-1
E
N Arbitrary data
Q
Arbitrary data
4.3 Processing when Simultaneous Transmission is Performed during Full-Duplex Communications
Sum check
code
Sum check
code
Sum check
code
Sum check
code
Sum check
code
Sum check
Time check
code
(timer 1)
Sum check
code
Sum check
code
4 DATA COMMUNICATION USING BIDIRECTIONAL PROTOCOL
Ò-2
A
C
K
A
Time check
C
(timer 1)
K
Ó-2
Ignores the received
data of Ò-1.
(Simultaneous transmission
A
error occurred.)
C
K
Ó-2
Ò-2
A
C
K
Ignores the received
data of Ó-1.
Ignores the received
data of Ò-1.
Simultaneous transmission error
occurred.
Ignores the received data of Ó-1.
4
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