Mitsubishi Electric MELSEC-Q Series - Page 257

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CHAPTER 7 PROCESSING TIME
7
7.3 Cyclic Transmission Delay Time 7.3.2 Transmission delay time calculation example
(c) Link refresh time ( Page 245, Section 7.2)
(d) Cyclic transmission delay time ( Page 250, Section 7.3.1)
(1) Sending-side link refresh time, receiving-side link refresh time
T, R =
90 × 10
-3
+ 0.41 × 10
-3
× {(1024 + 0 + 0 + 512)  16 + 1024 + 512} + 0 + 0
= 0.76 [ms]
(2) Link refresh time between relay station and sending side (for transfer)
MT =
90 × 10
-3
+ 0.41 × 10
-3
× {(1024 + 0 + 0 + 512)  16 + 1024 + 512} + 0 + 0.06
= 0.82 [ms]
L
= 25 × 10
-3
+ 16.3 × 10
-3
× 2 + {64  16 + 0} × 0.73 × 10
-3
= 0.06 [ms]
(3) Link refresh time between relay station and receiving side (for transfer)
MR
= 90 × 10
-3
+ 0.41 × 10
-3
× {(1024 + 0 + 0 + 512)  16 + 1024 + 512 } + 0 + 0.04
= 0.80 [ms]
L
= 25 × 10
-3
+ 16.3 × 10
-3
× 1 + {32 16 + 0} × 0.73 × 10
-3
= 0.04 [ms]
Transmission delay time (for Universal model QCPU) =
(ST + T) + (LS
T
× 1) + MR + MT + (LS
R
× 1) + (SR × 2) + R [ms]
= (1 + 0.76) + (1.30 × 1) + 0.80 + 0.82 + (1.30 × 1) + (1 × 2) + 0.76
= 8.74 [ms]
[Interlink transmission time for the Universal model QCPU]
L KM4 (KM5 n1) KM6 [ms]
LB
T
16
LW
T