Pwm Controller - ABB 2CSYK1201C Product Manual

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7.3.3

PWM controller

The PWM controller has the same continuous control as a continuous controller. The only difference is that with a
PWM controller the 1-byte control value (0...255) is converted to a on/off ratio (0 and 1). For example, if a control value
of 70% is output, the make time will be 7 minutes and the break time 3 minutes at a default cycle time of 10 minutes.
This transfers the advantages of continuous control (control to the desired setpoint, no oscillations) to drives that
are designed for on/off signals only, such as electrothermal drives.
T
21 ûC
1
0
10 min
Continuous room heating or cooling in spite of the ON/OFF value of the
control value depends on the thermal inertia of the heating or cooling element.
Planning and use
t
t
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Building Automation | Planning and use 69
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