Plc Link Response Time - Panasonic FP0R User Manual

7.7.6 PLC Link Response Time

The maximum value for the transmission time (T) of one cycle can be calculated using the
following formula.
T max. = Ts1 + Ts2 +
Ts (transmission time per station)
1
Ts = scan time + Tpc
Tpc = Ttx  Pcm
Ttx = 1/transmission speed  1000  11ms  0.096ms at 115200bit/s
Pcm = 23 + (number of relay words + number of register words)  4
Tpc (PLC link sending time)
Ttx (sending time per byte)
Pcm (PLC link sending size)
Tlt (link table sending time)
2
Tlt = Ttx  Ltm
Ttx = 1/transmission speed ´ 1000 ´ 11ms » 0.096ms at 115200bit/s
Ltm = 13 + 2  n
Ttx (sending time per byte)
Ltm (link table sending size)
n = number of stations being added
Tso (master station scan time)
3
The master station scan time should be confirmed using the programming tool.
Tlk (link addition processing time)
4
If no stations are being added, Tlk = 0.
Tlk = Tlc + Twt + Tls+ Tso
Tlc = 10  Ttx
Ttx = 1/transmission speed  1000  11ms  0.096ms at 115200bit/s
Twt = Initial value 400ms (can be changed using SYS1 instruction)
Tls = 7  Ttx
Ttx = 1/transmission speed  1000  11ms  0.096ms at 115200bit/s
Tlc (link addition command sending time)
Twt (addition waiting time)
Ttx (sending time per byte)
Tls (link error stop command sending time)
Tso (master station scan time)
Ttx (sending time per byte)
Tso (master station scan time)
+ Tsn + Tlt + Tso + Tlk
Communication
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