Variable Duty Factor Pulse Outputs (Pwm(891) Outputs); 5-2-10 Example Pulse Output Applications - Omron CP1L CPU UNIT - 06-2007 Operation Manual

Pulse Outputs
5-2-9

Variable Duty Factor Pulse Outputs (PWM(891) Outputs)

Overview
Bit Allocations
Procedure
Determine the pulse output port.
Wire the outputs.
PLC Setup settings
Ladder program
Specifications
Note

5-2-10 Example Pulse Output Applications

Outputting Pulses after a Preset Delay
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.
Word Bit
CIO 100 01
03
• PWM output 0 or PWM output 1
• Enable/disable the origin search function.
Execute PWM(891).
Item
Duty factor
Frequency
Output mode
Instruction
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.
This example program waits for a preset time (0.5 ms) after the interrupt input
(CIO 0.04) goes ON and then outputs 100,000 pulses at 100 kHz from pulse
output 0.
Function
PWM output 0
PWM output 1
Specifications
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 .)
0.1 Hz to 6,553.5 Hz
Set in 0.1 Hz units. (See note.)
Continuous mode
PWM(891)
Section 5-2
229