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CHAPTER 7 PROCESSING TIME
7
7.4 Dedicated Instruction Transmission Delay Time
7.4.2 CC-Link dedicated instruction transmission delay time
7.4.2 CC-Link dedicated instruction transmission delay time
The following shows the calculation formulas for the CC-link dedicated instruction transmission delay time (the time
taken from issuing an instruction until receiving a response).
(1) Transmission delay time for the RIRD/RIWT instruction
*1 For the scan time delay due to tracking transfer, refer to the following.
QnPRHCPU User's Manual (Redundant System)
Sending station Transmission delay time of when the receiving station is a non-redundant system [ms]
Non-redundant system
TD1 = (ST + T) × 2 + LS × 11 + Receiving station processing time
• When the receiving station is the CC-Link IE Controller Network module:
Receiving station processing time = (SR +
R)
• When the receiving station is other than the CC-Link IE Controller Network module:
Refer to the manual for the receiving station for the receiving station processing time.
Redundant system TD1 + TsT × 2
Sending station
Transmission delay time of when the receiving station is a redundant system
(control system CPU) [ms]
Non-redundant system
TD2 = (ST + T) × 2 + LS × 11 + Receiving station processing time
• When the receiving station is the CC-Link IE Controller Network module:
Receiving station processing time = (SR + R + TsR)
• When the receiving station is other than the CC-Link IE Controller Network module:
Refer to the manual for the receiving station for the receiving station processing time.
Redundant system TD2 + TsT × 2
TD1, TD2: Transmission delay time for the RIRD/RIWT 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
*1
TsR: Scan time delay due to tracking transfer on the receiving side
*1
LS: Link scan time
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