152
Remote I/O Communications Performance
Section C-1
Slave Units
K Calculation Example
Conditions
K =
(
7
×
5.37
µ
s) + (
2
×
5.37
µ
s
)
≈
0.048 ms
T
CrmIn
(Input
Processing Time at
Master Board)
M = (Number of Word Output Slave Units connected
×
1.09
µ
s)
+ (Number of Word Input Slave Units connected
×
4.53
µ
s)
+ (Number of Bit Output Slave Units connected
×
0.56
µ
s)
+ (Number of Bit Input Slave Units connected
×
5.23
µ
s)
M Calculation Example
Conditions
M =
(
8
×
1.09
µ
s
) + (16
×
4.53
µ
s
) + (16
×
0.56
µ
s
) + (8
×
5.23
µ
s
)
≈
0.132 ms
T
CrmOut
(Output
Processing Time at
Master Board)
T
CrmOut
= 24.74
µ
s
+
(Number of Word Output Slave Units
×
0.46
µ
s
)
+ (((Number of Bit Output Slave Units + 7)
÷
8)
×
0.55
µ
s
)
T
RelAcc
(Processing
Time to Release an
Access Right)
T
RelAcc
= 6.91
µ
s
+
(Number of Word Output Slave Units
×
0.46
µ
s
)
+ (((Number of Bit Output Slave Units + 7)
÷
8)
×
0.55
µ
s
)
T
PC
(Time for a PC to
Process the
Application)
Measure the process time for an actual application.
Data rate
Slave Unit Type
4.0 Mbit/s
3.0 Mbit/s
1.5 Mbit/s
93.75 kbit/s
Word Output Unit
4.06
µ
s
5.37
µ
s
10.88
µ
s
170.93
µ
s
Bit Output Unit
4.06
µ
s
5.37
µ
s
10.88
µ
s
170.93
µ
s
Data rate
Word Outputs
Word Inputs
Bit outputs
Bit inputs
3.0 Mbit/s
7 Units
8 Units
9 Units
10 Units
Data rate
4.0 Mbit/s
3.0 Mbit/s
1.5 Mbit/s
93.75 kbit/s
T
CrmIn
0.47 ms + M
0.52 ms + M
0.77 ms + M
7.32 ms + M
Data rate
Word Outputs
Word Inputs
Bit outputs
Bit inputs
3.0 Mbps
8 Units
16 Units
16 Units
8 Units
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...
Страница 237: ......