7
PROCESSING TIME
7.4 Dedicated Instruction Transmission Delay Time
7.4.2 CC-Link Dedicated Instruction Transmission Delay Time
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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 Total for the number of mounted network modules.
* 2 For the scan time delay due to tracking transfer, refer to the following manual.
QnPRHCPU User's Manual (Redundant System)
Table 7.27 When receiving station is non-redundant system [ms]
Sending station
Receiving station (non-redundant system)
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
Table 7.28 When receiving station is redundant system [ms]
Sending station
Receiving station (redundant system (control system CPU))
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
*1
R: Link refresh time on receiving side
*1
TsT: Scan time delay due to tracking transfer on the sending side
*2
TsR: Scan time delay due to tracking transfer on the receiving side
*2
LS: Link scan time
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