ABB ECA06 Configuration And Installation page 217

Appendix A: Application Examples
Feed Forward
The Feed Forward mode must be set to StaticGain. The signal that is fed forward
is the flow measured by the transmitter FT1, which is connected to AI2. The Gain
must be tested by trial and error but in this example it is set to 2.
1
2
3
Gain Scheduling
The Gain Scheduling must be enabled and the limits set. The non-linearity in the
control valve in this example is divided into three ranges with limits at 40% and
60%.
493-0736-11 (6-2)
Absolute Alarm 1
HiLimit
Cancel
Control → Parameters → Feed Forward→ Mode = StaticGain.
Feed Forward
Mode
Cancel
Control → Parameters → Feed Forward → FeedForwardSignal =
AI2[Value].
AI2: Level
FeedForwardSignal
Cancel
Control → Parameters → Feed Forward→ Gain = 2.
Feed Forward
Gain
Cancel
A.1 Level Control with Feed Forward and Gain Scheduling
80%
OK
Static Gain
OK
AI2[Value]
OK
2
OK
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