Rievtech ELC Series - Page 164

EN
Programmable Relay ● User Manual for ELC, EXM and PR Series 164 2020 v6.0 ● © Rievtech Co.,
Ltd. ● www.rievtech.com
Pulse Width Modulator (PWM)
Description of function
The Pulse Width Modulator (PWM) instruction modulates
the analogue input value Ax to a pulsed digital output
signal. The pulse width is proportional to the analogue
value Ax.
Connection
Description
Input En ( )
A positive edge (0 to 1 transition) at
input En enables the PWM function
block.
Input Ax
Analog signal to be modulated to a
pulsed digital output signal.
Parameter
A: Gain
Range of values: +- 10.00
B: Zero offset
Range of values: +- 10,000
PT: Periodic time over which the
digital output is modulated
p: Number of decimals
Range of values: 0, 1, 2, 3
Output Q
Q is set or reset for the proportion
of each time period according to
the proportion of the standardized
value Ax to the analogue value
range.
Parameter PT
The periodic time PT can be provided by the actual value
of another already-programmed function:
Analog comparator (Ax – Ay) Analog threshold trigger
(Ax)
Analog amplifier (Ax) Analog multiplexer (AQ)
Analog ramp (AQ) Mathematic instruction
(AQ)
PI controller (AQ) Up/down counter (Cnt)
Analog filter (AQ) Average value (AQ)
Max/Min (AQ) On-delay (Ta)
Off-delay (Ta) On-/off-delay (Ta)