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286
Pulse Outputs
Section 7-2
7-2-9
Variable Duty Factor Pulse Outputs (PWM(891) Outputs)
Overview
PWM (Pulse Width Modulation) pulse outputs can be output with a specified
duty factor. The duty factor is the ratio of the pulse's ON time and OFF time in
one pulse cycle. Use the PWM(891) instruction to generate variable duty fac-
tor pulses from a built-in output.
The duty factor can be changed while pulses are being output.
Bit Allocations
Procedure
Specifications
Note
The frequency can be set up to 6553.5 Hz in the PWM(891) instruction, but
the duty factor accuracy declines significantly at high frequencies because of
limitations in the output circuit at high frequencies.
Word
Bit
Function
CIO 100
01
PWM output 0
03
PWM output 1
Item
Specifications
Duty factor
0.0% to 100.0% in 0.1% increments
(Duty factor accuracy is
+
1%/
−
0% at10 kHz,
+
5%/
−
0% at
10 to 32.8 kHz .)
Frequency
0.1 Hz to 6,553.5 Hz
Set in 0.1 Hz units. (See note.)
Output mode
Continuous mode
Instruction
PWM(891)
•
PWM output 0 or PWM output 1
•
Enable/disable the origin search function.
Execute PWM(891).
Determine the pulse output port.
Wire the outputs.
PLC Setup settings
Ladder program
Содержание CP1L-EL20DR-D
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Страница 178: ...144 Connecting the CX Programmer Section 5 1 Click the Connect button to connect and then connection online is completed...
Страница 192: ...158 Trial Operation and Debugging Section 5 3...
Страница 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
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Страница 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Страница 836: ...802 PLC Setup Appendix G...
Страница 838: ...804 TCP Status Transitions Appendix H...
Страница 840: ...806 Ethernet Network Parameters Appendix I...
Страница 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
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