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Appendix 5 Processing Time
This chapter describes the processing time of CC-Link IE Field Network.
Appendix 5.1 Link refresh time
The following are formulas to calculate the link refresh time.
(1) Safety communication
(2) Standard communication
*1 Total number of link device points for the range set by the refresh parameters and set in the network configuration
setting. Note that the points assigned to reserved stations are excluded.
*2 This value is for standard communication between safety CPU modules.
sTR: Link refresh time of safety communication
n: Link refresh time of the receiving side of safety communication
KM1,KM2: Constant (KM1=2.80, KM2=0.20)
T: Link refresh time of the sending side of standard communication
R: Link refresh time of the receiving side of standard communication
RX:
Total number of RX points that are actually being link-refreshed
*1
RY:
Total number of RY points that are actually being link-refreshed
*1
RWr:
Total number of RWr points that are actually being link-refreshed
*1
RWw:
Total number of RWw points that are actually being link-refreshed
*1
SB: Number of SB points
SW: Number of SW points
KM3, KM4: Constant (KM3=0.09, KM4=0.41( × 10
-3
)
*2
STR = KM1 + KM2 n [ms]
T , R = KM3 + KM4
[ms]
RX + RY + SB
+ RWr + RWw + SW
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