Mitsubishi MELSEC Q Series User Manual page 106

4 FUNCTIONS
PLC CPU
(Sequence scan)
Master station buffer memory
(Remote input RX)
Link scan
Response time of the first station
Response time of the corresponding station
Response time of the final station
Responses from remote
I/O stations
4 - 60
2) Sequence scan < Link scan
Input 1)
I
I: Delay time due to response delay of remote I/O station
II: Delay time of transmission from the remote I/O station to the master
station
III: Delay time from reception by the master station to storage in the buffer
memory
IV: Delay time until the master station's information is refreshed in the PLC
CPU
Input 2)
II III
Transmission delay time
MELSEC-Q
IV
4 - 60