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216
Message Delay Times
Section 8-4
Number of words:
256
Data links:
Halted
Note This communications cycle time is calculated assuming that there is no node
that transmits event frames before the SEND command is executed.
Link Unit servicing (source node)
×
2
PC scan time (source node)
×
2
Transmission processing (command)
3.3 ms
Communications cycle time
×
2 (see note)
(600
×
4 + 110
×
32 + 320
×
0 + 4
×
0 + 2,290)
×
2 = 8,210
µ
s
×
2
≅
16.4 ms
Transmission delay (command)
0.112
≅
0.1 ms
Reception processing (command)
2.3 ms
Link Unit servicing (destination node)
PC scan time (destination node)
Transmission processing (response)
0.00125
×
256 + 3 = 3.32
≅
3.3
Transmission delay (response)
0.008
×
256 + 0.112 = 2.16
≅
2.2
Reception processing (response)
0.00125
×
256 + 2.3 = 2.62
≅
2.6
Total (max. transmission delay)
PC cycle time (source node)
×
2
+ PC cycle time (destination
node) + Peripheral servicing
time (destination node) +
29.9 ms
Содержание CVM1-CLK21
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