253
CHAPTER 7 PROCESSING TIME
7
7.3 Cyclic Transmission Delay Time
7.3.2 Transmission delay time calculation example
(d) Cyclic transmission delay time ( Page 250, Section 7.3.1)
(2) Transmission delay time in a multi-network system
*1 Depending on the points of the interlink transmission, more than one sequence scan may be required at the relay
station. ( Page 248, Section 7.2 (2) (a))
Calculated value
Transmission delay time for ST < LS [ms]
Station-based block data assured
Normal value
(ST + T) + LS × 1 + (SR + R) × 1.5
(1 + 0.80) + 1.58 × 1 + (1 + 0.80) × 1.5 = 6.08 [ms]
Maximum value
(ST + T) + LS × 2 + (SR + R) × 2
(1 + 0.80) + 1.58 × 2 + (1 + 0.80) × 2 = 8.56 [ms]
CPU module
1M
P1
1N
S2
1N
S3
1N
S3
2M
P1
2M
P1
2N
S2
2N
S3
0
3FF
13FF
1FFF
1000
LB LB
B
1000 to 101F
1020 to 103F
100 to 11F
200 to 21F
1300 to 131F
0 to 1F
1M
P11NS22NS22NS3
Network No.1
Network No.2
Link refresh
range
The transfer target link
devices do not turn
ON/OFF since they are
not set within the link
refresh range.
B1000
B1300
B0
B200
B1300
B200 B1000
B0
B280
B281
Sequence scan in
sending station
Link scan at sending
station side
Sequence scan in
relay station
Link scan at receiving
station side
Sequence scan in
receiving station
B0
B0
*1
B1000
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