Parameters vacon • 127
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7.1.14.4 Group 3.13.4: FeedForward
Feedforward usually needs accurate process models, but in some simple cases a gain + offset type
of feedforward is enough. The feedforward part does not use any feedback measurements of the
actual controlled process value (water level in the example on page 170). VACON
®
feedforward
control uses other measurements which are indirectly affecting the controlled process value.
7.1.14.5 Group 3.13.5: Sleep Function
This function will put the drive into sleep mode if the frequency stays below the sleep limit for a lon-
ger time than that set with the Sleep Delay.
Table 108. Feedforward settings
Code Parameter Min Max Unit Default ID Description
P3.13.4.1 Function 1 9 1 1059 See P3.13.3.1.
P3.13.4.2 Gain -1000 1000 % 100.0 1060 See P3.13.3.2
P3.13.4.3 FF 1 Source 0 25 0 1061 See P3.13.3.3
P3.13.4.4 FF 1 Minimum -200.00 200.00 % 0.00 1062 See P3.13.3.4
P3.13.4.5 FF 1 Maximum -200.00 200.00 % 100.00 1063 See P3.13.3.5
P3.13.4.6 FF 2 Source 0 25 0 1064 See P3.13.3.6
P3.13.4.7 FF 2 Minimum -200.00 200.00 % 0.00 1065 See P3.13.3.7
P3.13.4.8 FF 2 Maximum -200.00 200.00 % 100.00 1066 See P3.13.3.8
Table 109. Sleep function settings
Code Parameter Min Max Unit Default ID Description
P3.13.5.1 SP 1 Sleep Freq 0.00 320.00 Hz 0.00 1016
Drive goes to sleep mode when
the output frequency stays below
this limit for a time greater than
that defined by parameter Sleep
delay.
P3.13.5.2 SP 1 Sleep Delay 0 3000 s 0 1017
The minimum amount of time
the frequency has to remain
below the Sleep level before the
drive is stopped.
P3.13.5.3 SP 1 WakeUpLevel Varies 0.00 1018
Defines the level for the PID
feedback value wake-up super-
vision. Uses selected process
units.
P3.13.5.4 SP 1 WakeUpMode 0 1 0 1019
Select if wake up level should
work as an absolute level or as
an offset below the actual set-
point value.
0 = Absolute Level
1 = Relative Setpoint
P3.13.5.5 SP 2 Sleep Freq 0.00 320.00 Hz 0.00 1075
Drive goes to sleep mode when
the output frequency stays below
this limit for a time greater than
that defined by parameter Sleep
delay.
P3.13.5.6 SP 2 Sleep Delay 0 3000 s 0 1076
The minimum amount of time
the frequency has to remain
below the Sleep level before the
drive is stopped.
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