ABB ECA06 - Page 180

3.6 Setting the Configuration Chapter 3: Configuration
180 493-0736-11 (6-2)
The stiction compensation function detects the signal direction of the analog
output signal and adds positive or negative pulses, depending on the signal
direction, see figure below.
Figure 61 The stiction compensation function adds positive or negative pulses to the output
signal.
The pulse period time will be the Pulse period factor (n) x the pulse width (τ).
The Pulse width value must be greater than or equal to the parameter SampleTime
(TS). Example. If Ts = 0.050 s, then select τ = 0.050, 0.100, 0.150, ...
If Ts = 0.100 s, then select τ = 0.100, 0.200, 0.300, ...
Note. If the SampleTime value is greater than the pulse width τ , then τ will
automatically be set to the SampleTime value (when the stiction compensation
function is activated).
The hysteresis factor prevents the pulses from being superimposed and limits the
number of pulses when the signal variation is low.
Table 134 Stiction Compensation parameters.
Parameters
Name Setting Unit
Mode Off, On None
Amplitude 1–5 %
PulseWidth 0.030–0.500 seconds
PulsePeriodFactor 2–5 -
Hysteresis 0.00–1.00 %
h
τ a
n
*
τ
a = Pulse amplitude
τ = Pulse width
h = Hysteresis
n = Pulse period factor
n*
τ = Pulse period time