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High-speed Counters
Section 5-2
Pulse Frequency Conversion
The pulse frequency input to a high-speed counter can be converted to a rota-
tional speed (r/min) or the PV of the counter can be converted to the total
number of rotations. The converted value is output as 8-digit hexadecimal.
This function is supported only for high-speed counter 0.
Frequency
−
Rotational Speed Conversion
The rotational speed in r/min is calculated from the pulse frequency input to a
high-speed counter and the number of pulses per rotation.
Counter PV
−
Total Number of Rotations Conversion
The total number of rotations is calculated from the present value of the
counter and the number of pulses per rotation.
Procedure
1,2,3...
1.
High-speed Counter Enable/Disable Setting (Required)
Select the Use high speed counter 0 Option in the PLC Setup.
2.
Pulse Input Mode Setting (Required)
Set the High-speed Counter 0 Pulse Input Mode (Input Setting) in the PLC
Setup.
3.
Counting Mode Setting (Required)
Set the High-speed Counter 0 Counting Mode in the PLC Setup.
If ring mode counting is selected, set the Circular Max. Count (max. ring
count) in the PLC Setup.
4.
Reset Method Setting (Required)
Set the High-speed Counter 0 Reset Method in the PLC Setup.
5.
Execute PRV2(883) as described below (required).
Converting the Frequency to a Rotational Speed
Execute PRV2(883) with the following operands.
C: Control data (Set to #0000 for frequency-rotational speed conversion.)
P: Coefficient (pulses/rotation (hex))
D: First word for result
Converting the Counter PV to the Total Number of Rotations
Execute PRV2(883) with the following operands.
C: Control data (Set to #0001 for counter PV-total number of rotations con-
version.)
P: Coefficient (pulses/rotation (hex))
D: First word for result
Restrictions
Pulse frequency conversion is possible only for high-speed counter 0.
Measurement method
Execution of the PRV(881) instruction
Output data range
Units: Hz
Range:
Differential phase input: 0000 0000 to 0003 0D40 hex
(Y models: 0000 0000 to 0007 A120 hex)
All other input modes: 0000 0000 to 0001 86A0 hex (Y
models: 0000 0000 to 000F 4240 hex)
Item
Specifications
Содержание CP1H-CPU - 05-2006
Страница 1: ...OPERATION MANUAL CP1H CPU Unit SYSMAC CP Series CP1H X40D CP1H XA40D CP1H Y20DT D Cat No W450 E1 02...
Страница 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Страница 3: ...iv...
Страница 11: ...xii TABLE OF CONTENTS...
Страница 15: ...xvi...
Страница 19: ...xx...
Страница 31: ...xxxii Conformance to EC Directives 6...
Страница 71: ...40 Function Blocks Section 1 5...
Страница 133: ...102 Computing the Cycle Time Section 2 7...
Страница 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Страница 411: ...380 Clock Section 6 8...
Страница 519: ...488 Replacing User serviceable Parts Section 10 2...
Страница 527: ...496 Standard Models Appendix A...
Страница 535: ...504 Dimensions Diagrams Appendix B...
Страница 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Страница 659: ...628 PLC Setup Appendix G...
Страница 665: ...634 Index work words 159 write protection 370...
Страница 667: ...636 Revision History...