3.6 Setting the Configuration Chapter 3: Configuration
160 493-0736-11 (6-2)
Note:
The DeltaU signal can take negative or positive values. The EMA60 does not
have a Control Block and therefore the signal DeltaU does not exist. This means
that the modes InAutoWDeltaU and WhenEnabledWDeltaU do not exist in the
EMA60. In the text and tables below, any features which are not available in the
EMA60 are identified by a “*” character.
In the modes InAutoWDeltaU, WhenEnabled and WhenEnabledWDeltaU the
switch from Manual to Auto is mostly not bumpless. If the manually adjusted
ControlSignal differs from TrackSignal + DeltaU when switching from Manual
to Auto, the ControlSignal makes a jump. In some applications where this is not
acceptable the mode InAutoBumpless should be used. It is active whenever Mode
is InAutoBumpless and the Control Mode is Auto. In practice, the Output
Configuration block ramps the ControlSignal from the manually adjusted value
to the value defined by TrackSignal + DeltaU. The speed of this ramp is defined
by the parameter BumplessSpeed.
The Tracking function is summarised in the table below.
Table 116 Tracking Function.
Note: In the table above TrackEnable means TrackOneEnable or
TrackTwoEnable and TrackSignal means TrackOneSignal or TrackTwoSignal.
Mode Active When... ControlSignal = ...
InAutoBumpless ControlMode = Auto TrackSignal
InAutoWDeltaU* ControlMode = Auto TrackSignal + DeltaU
WhenEnabled TrackEnable = True TrackSignal
WhenEnabledWDeltaU* TrackEnable = True TrackSignal + DeltaU
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