Mitsubishi Electric MELSEC-Q Series User Manual page 167

CHAPTER 8 FUNCTIONS
(b) Data flow in the synchronous mode
• Sequence scan  link scan
CPU module
(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
Input 1) Input 2)
I II III IV
Transmission delay time
8
I: Delay time due to response delay of the remote I/O station
II: Delay time of transmission from the remote I/O station to the master station
III: Delay time between the master station receiving data and the data being stored into the buffer memory
IV: Delay time until information of the master station is refreshed in the CPU module
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