ABB ECA06 Configuration And Installation page 143

Chapter 3: Configuration
Feed Forward
Available in
The Feed Forward function block has one analog input, FeedForwardSignal, and
ECA06 ECA60 ECA600 EMA60
- X X -
three parameters – Mode, Gain and Reset.
Table 106
The parameter Mode sets the mode of operation, Off, Static Gain or Adaptive
Gain.
The Gain parameter can be configured within the range –10.0 to +10.0, but is
obsolete when Adaptive Feed Forward is used.
When the Reset parameter is set to OK the internal parameters for the Adaptive
Feed Forward function are reset.
Table 107
Note: If the controller is moved to another control application you must reset the
Adaptive Feed Forward.
When using Feed Forward, a term (u
PID algorithm (u
The term, u
factor (Gain):
493-0736-11 (6-2)
Name
FeedForwardSignal
Feed Forward Inputs.
Name
Mode Off, StaticGain, AdaptiveGain
–10.0 ≤ Gain ≤ 10.0
Gain
Reset OK
Feed Forward Parameters.
), and these two make the ControlSignal (u):
PID
, is a product where the FeedForwardSignal is multiplied by a
FF
Inputs
Parameters
Setting
) is added to the signal produced by the
FF
u = u + u
PID
= FeedForwardSignal × Gain
u
FF
3.6 Setting the Configuration
Connection
off, Analog
none
none
none
FF
Unit
143