Mitsubishi QJ71MT91

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MELSEC-Q
5 FUNCTIONS
<Operation of KeepAlive function>
Message
KeepAlive
interval
timer
KeepAlive
start
timer
Error
QJ71MT91
MODBUS /TCP
target device
R
Stop
ACK
<KeepAlive resend count: 3 times>
KeepAlive message KeepAlive message KeepAlive message KeepAlive message
Timeout
Start
Start
Start
Start
Timeout
Start Start
Timeout (Alive check error) TimeoutTimeout
Message MessageMessage Message MessageMessage Message Message
Message MessageMessage Message MessageMessage Message Message