Dedicated Instruction Transmission Delay Time; Link Dedicated Instruction Transmission Delay Time - Mitsubishi Electric MELSEC Q Series Reference Manual

7.4

Dedicated Instruction Transmission Delay Time

7.4.1

Link dedicated instruction transmission delay time

The following shows the calculation formulas for the link dedicated instruction transmission delay time (the time taken
from issuing an instruction until receiving a response).
(1) For a single network system
(a) Transmission delay time for the SEND/RECV/RECVS/ZNRD/ANWR instruction
Sending station
TD1 = (ST + T) × 2 + LS × 11 + (SR + R)
Non-redundant system
Redundant system TD1 + TsT × 2
Sending station
TD2 = (ST + T) × 2 + LS × 11 + (SR + R + TsR)
Non-redundant system
Redundant system TD2 + TsT × 2
TD1, TD2: Transmission delay time for the SEND/RECV/RECVS/ZNRD/ZNWR instruction
ST: Sequence scan time on sending side (except link refresh time and scan time delay due to tracking
transfer)
SR: Sequence scan time on receiving side (except link refresh time and scan time delay due to tracking
transfer)
T:
Link refresh time on sending side (Total of the number of mounted network modules)
R:
Link refresh time on receiving side (Total of the number of mounted network modules)
TsT: Scan time delay due to tracking transfer on the sending side
TsR: Scan time delay due to tracking transfer on the receiving side
LS: Link scan time
*1 For the scan time delay due to tracking transfer, refer to the following.
QnPRHCPU User's Manual (Redundant System)
256
Transmission delay time of when the receiving station is a non-redundant system [ms]
Transmission delay time of when the receiving station is a redundant system
(control system CPU) [ms]
*1
*1