151
Remote I/O Communications Performance
Section C-1
S1 Calculation Example
Conditions
S1
=
60
×
3.38
µ
s
≈
0.202 ms
S2 is the correction coefficient that is used when more than 64 Bit IN Slave Units are
connected.
S2 = Number of connected Bit IN Slave Units
×
Correction coefficient for each Bit IN
Slave Unit
S2 Calculation Example
Conditions
S2
=
120
×
0.4
µ
s
≈
0.048 ms
T
NetIn
(Time Allotted
for IN Frames in
Communications
Cycle Time)
T
NetOut
(Time Allotted
for OUT Frame in
Communications
Cycle Time)
K = (Number of Word Output Slave Units connected
×
additional time per
Word Output Slave Unit)
+ ((Number of Bit Output Slave Units + 7)
÷
8)
×
additional time per 8 Bit
Output Slave Units)
Additional time per Word Output Slave Unit / Additional time per 8 Bit Output
Data rate
Word Inputs
4.0Mbps
60 Units
Slave Unit
Type
4.0Mbps
3.0Mbps
1.5Mbps
93.75kbps
Bit IN Slave
7.47
µ
s
0.40
µ
s
4.46
µ
s
-
Data rate
Bit Inputs
3.0Mbps
120 Units
Data rate
T
NetIn
4.0 Mbps
0.010 ms
×
(Number of Bit Input Slave Units) + S2 + 0.011 ms
×
(Number of Word Input Slave Units) + S1
3.0 Mbps
0.020 ms
×
(Number of Bit Input Slave Units) + S2 + 0.022 ms
×
(Number of Word Input Slave Units) + S1
1.5 Mbps
0.044 ms
×
(Number of Bit Input Slave Units) + S2 + 0.051 ms
×
(Number of Word Input Slave Units) + S1
93.75 kbps
0.531 ms
×
(Number of Bit Input Slave Units) + 0.657 ms
×
(Number of
Word Input Slave Units)
Data rate
4.0 Mbit/s
3.0 Mbit/s
1.5 Mbit/s
93.75 kbit/s
T
NetOut
0.013 ms + K
0.018 ms + K
0.035 ms + K
0.567 ms + K
Содержание 3G8F7-CRM21
Страница 4: ...iv...
Страница 10: ...x TABLE OF CONTENTS...
Страница 30: ...10 Specifications Section 1 7 1 7 3 Dimensions 3G8F7 CRM21 PCI unit mm 3G8F8 CRM21 CompactPCI unit mm...
Страница 46: ...26 Connecting the Communications Power Supply Cables Section 2 4...
Страница 74: ...54 Board Hardware Error Notification Section 4 8...
Страница 173: ...153 APPENDIX D Sample Program D 1 Sample Program 154...
Страница 230: ...210 Wiring for Power Supply Section E 5...
Страница 234: ...214 Index...
Страница 236: ...216 Revision History...
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