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4.3 Response Time of PLC Link
Condition
Relays / registers are evenly
allocated, and
Each PLC scan time = 1 ms
16-unit link with all units added
Max. unit number = 16
2
Relays / registers are evenly
allocated
Each PLC scan time = 5 ms
16-unit link with one unit unadded,
Max. unit number = 16
3
Relays / registers are evenly
allocated
Each PLC scan time = 5 ms
8-unit link with all units added
Max. unit number = 8
4
Relays / registers are evenly
allocated
Each PLC scan time = 5 ms
2-unit link with all units added
Max. unit number. = 2
5
Relays / registers are evenly
allocated
Each PLC scan time = 5 ms
2-unit link with all units added
Max. unit number = 2
6
Relay 32 points / register 2W are
evenly allocated Each PLC scan
time = 1 ms
4.3.2 Response Time when There are Units that have not been Added to the
Link
● If there is an unadded unit, Tlk (link addition processing time) becomes longer, and makes
transmission cycle time longer.
● "Unadded unit" refers to a unit that is not connected between unit No. 1 and the largest unit
number, or to a unit that is connected but has not powered ON.
4-10
Calculation process
Tpc=Ttx×Pcm=0.096×71≈6.82 ms
Each Ts=1+6.82=7.82 ms
Tlt=0.096×(13+2×16)=4.32 ms
Ttx=0.096
Each Pcm=23+(4+8)×4=71 bytes
Tpc=Ttx×Pcm=0.096×71≈6.82 ms
Each Ts=5+6.82=11.82 ms
Tlt=0.096×(13+2×16)=4.32 ms
Ttx=0.096
Each Ts=5+6.82=11.82ms
Tlt=0.096×(13+2×15) ≈4.13 ms
Tlk=0.96+400+0.67+5≈407 ms
Note: addition waiting time default value =
400 ms
Ttx=0.096
Each Pcm=23+(8+16)×4=119 bytes
Tpc=Ttx×Pcm=0.096×119≈11.43 ms
Each Ts=5+11.43=16.43 ms
Tlt=0.096×(13+2×8) ≈2.79 ms
Ttx=0.096
Each Pcm=23+(32+64)×4=407 bytes
Tpc=Ttx×Pcm=0.096×407≈39.072 ms
Each Ts=5+39.072=44.072 ms
Tlt=0.096×(13+2×2) ≈1.632 ms
Ttx=0.096
Each Pcm=23+(1+1)×4=31 bytes
Tpc=Ttx×Pcm=0.096×31≈2.976 ms
Each Ts=1+2.976=3.976 ms
Tlt=0.096×(13+2×2) ≈1.632 ms
One transmission cycle
time (T)
=130.44 ms
T max.=Ts+Tlt+Tso
11.82×16+4.32+5
=198.44 ms
T max. =Ts+Tlt+Tso+Tlk
11.82×15+4.13+5+407
=593.43 ms
T max.=Ts+Tlt+Tso
16.438+2.79+5
=139.23 ms
T max.=Ts+Tlt+Tso
44.072×2+1.632+5
=94.776 ms
T max.=Ts+Tlt+Tso
3.976×2+1.632+1
=10.584 ms
WUME-FPXHCOMG-02
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