Omron SYSMAC CP Series, User Manual

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1 3 PWM Outputs
13-2
CP2E CPU Unit Software User’s Manual(W614)
13-1 PWM Outputs (Variable-duty-factor
Pulse Outputs)
PWM outputs can be used only with the CP2E N/S -type CPU Unit with transistor outputs.
A PWM (Pulse Width Modulation) pulse 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 instruction to generate
PWM pulses from a built-in output. The duty factor can be changed during pulse output.
z
Application example
• Controlling temperature on a time-proportional basis using the PWM output.
• Controlling the brightness of lighting.
* The duty factor accuracy declines significantly at high frequencies because of limitations in the output circuit at
high frequencies.
Additional Information
For N 3 0/40/60 CPU Units, the output indicator of terminal 01 on terminal block CIO100 is always
lit during PWM output.
Specifications
Item Specification
Duty factor 0.0% to 100.0% in 0.1% increments
(Duty factor accuracy is +1%/-0% at 10 kHz, +5%/-0% at 10 to
3 2 kHz .)
Frequency 2.0 Hz to 6,55 3 .5 Hz (Set in 0.1-Hz increments.)*
2 Hz to 3 2,000 Hz (Set in 1-Hz increments.)*
Output mode Continuous mode
Instruction PWM
D u ty f a ctor:50 %
100 %
50 %
75 %
15 %
D u ty f a ctor:15 %
D u ty f a ctor:75 %
B u ilt-in o u tp u t
PWM o u tp u t
Period i s determined
b y fre qu ency