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197
Pulse Outputs
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.
5-2
Pulse Outputs
5-2-1
Overview
Fixed duty factor pulses can be output from the CPU Unit's built-in outputs to
perform positioning or speed control with a servo driver that accepts pulse
inputs.
■
CW/CCW Pulse Outputs or Pulse + Direction Outputs
The pulse output mode can be set to match the motor driver's pulse input
specifications.
Содержание CP1L CPU UNIT - 03-2009
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Страница 34: ...xxxiv Conformance to EC Directives 6...
Страница 70: ...36 Function Blocks Section 1 5...
Страница 584: ...550 Trouble Shooting Section 8 7...
Страница 627: ...593 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Страница 630: ...596 Sample Application Section 9 12...
Страница 654: ...620 Troubleshooting Unit Errors Section 11 4...
Страница 662: ...628 Replacing User serviceable Parts Section 12 2...
Страница 668: ...634 Standard Models Appendix A...
Страница 698: ...664 Auxiliary Area Allocations by Function Appendix C...
Страница 746: ...712 Auxiliary Area Allocations by Address Appendix D...
Страница 773: ...739 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 774: ...740 Connections to Serial Communications Option Boards Appendix F...
Страница 806: ...772 Index...
Страница 808: ...774 Revision History...