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MELSEC-Q
3 SPECIFICATIONS
(6) Checking the transient transmission abnormal detection time
By using this function, the "Time," "Abnormal detection network number," and
"Abnormal detection station number" can be checked when a transient
transmission (READ, WRITE and other instructions) ends abnormally.
The time log can be used to identify the network problems and to determine how
the network can be improved.
For details on the instructions, refer to the Q-corresponding MELSECNET/H
network system reference manual (PLC to PLC network).
QCPU QJ71
LP21
Power supply
QJ72
LP25
QJ72
LP25
Request
sourse
Request
destination
Abnormal detection station
REA D
Power supply
Power supply
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