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Appendix 5.6 Transmission delay time of dedicated instructions
The following is the formula to calculate the transmission delay time of dedicated instructions (time after a dedicated
instruction is issued until the execution of the instruction is completed).
(1) Between the master station and an intelligent device station
(a) Master station (safety station) Intelligent device station (standard station)
TD1: 2.0 + LS × 12 × m + Rio + SM [ms]
LS: Link scan time
Rio: Intelligent device station processing time
SM: Master station sequence scan time
m: Number of divided sending = Value that "Data length 480" is rounded up to the nearest integer
(2) Between the master station and a local station
(a) Master station Local station
The formula for transmission delay time of dedicated instructions through the following roots is all the same.
• Master station (safety station) Local station (standard station)
• Master station (standard station) Local station (safety station)
• Master station (safety station) Local station (safety station)
TD1: 2.0 + LS × 12 × m + SL + SM [ms]
LS: Link scan time
SL: Local station sequence scan time
SM: Master station sequence scan time
m: Number of divided sending = Value that "Data length 480" is rounded up to the nearest integer
(b) Master station Local station
The formula for transmission delay time of dedicated instructions through the following roots is all the same.
• Master station (safety station) Local station (standard station)
• Master station (standard station) Local station (safety station)
• Master station (safety station) Local station (safety station)
TD1: 2.0 + LS × 12 × m + SM + SL [ms]
LS: Link scan time
SM: Master station sequence scan time
SL: Local station sequence scan time
m: Number of divided sending = Value that "Data length 480" is rounded up to the nearest integer