7
PROCESSING TIME
7.4 Dedicated Instruction Transmission Delay Time
7.4.1 Link Dedicated Instruction Transmission Delay Time
7
- 14
1
O
V
ER
VI
E
W
2
SYST
EM
CO
NF
IG
URA
T
IO
N
3
SPECI
F
IC
A
T
IO
N
S
4
F
UNCT
IONS
5
PREP
ARA
T
IO
N AND
SET
UP
6
P
A
RAM
E
T
E
R
SET
TI
NG
7
PRO
C
ESSI
NG
T
IM
E
8
PRO
G
R
AM
M
ING
(b) Transmission delay time for the READ/WRITE 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 7.17 When receiving station is non-redundant system [ms]
Sending station
Receiving station (non-redundant system)
Non-redundant system
TD1 = {(ST + T) × 2 + LS × 11 + (SR + R)} × m
Redundant system
TD1 + TsT × 2 × m
Table 7.18 When receiving station is redundant system and transmission does not pass through tracking cable [ms]
Sending station
Receiving station (redundant system)
Redundant system (control system CPU)
Redundant system (standby system CPU)
Non-redundant system
TD2 = {(ST + T) × 2 + LS × 11 + (SR + R + TsR)} × m
TD3 = {(ST + T) × 2 + LS × 11 + TsR} × m
Redundant system
TD2 + TsT × 2 × m
TD3 + TsT × 2 × m
Table 7.19 When receiving station is redundant system and transmission passes through tracking cable [ms]
Sending station
Receiving station (redundant system)
Access to control system CPU through standby system
Access to standby system CPU through
control system
Non-redundant system
TD4 = {(ST + T) × 2 + LS × 11 + (SR + R + TsR) + 6} × m
TD5 = {(ST + T) × 2 + LS × 11 + TsR + 6} × m
Redundant system
TD4 + TsT × 2 × m
TD5 + TsT × 2 × m
TD1 to TD5: Transmission delay time for the READ/WRITE 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
m: Number of fragmented transmissions = (Read or write data length) / 960 (Rounded up to the
nearest integer)
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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