Configuration - Drive
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9
iControl DC
System Speed loop filtering.
• Raw pattern frequency: Applies smoothing to the raw pattern frequency. Higher settings
provide better response but may result in uneven (bumpy) acceleration/deceleration.
• Flare pattern frequency: Applies smoothing to the flare pattern frequency. Higher settings
provide better response but may result in uneven (bumpy) acceleration/deceleration.
• Processed pattern frequency: Applies smoothing to the post-processing pattern signal.
Higher settings provide better response but may result in uneven (bumpy) acceleration/
deceleration.
• Speed reference frequency: Smooths the Tach/Encoder signal. Typical recommended
range is from 50 to 75 Hz. Higher values provide less smoothing.
• Proportional low-pass frequency: Filters higher frequencies from Proportional gain signal.
Higher values allow faster drive response, but may cause oscillation. Lower values slow
drive response, but reduce the possibility of oscillation.
• Differential low-pass frequency: Filters higher frequencies from Differential gain signal.
Lower values reduce the frequency level above which blocking occurs (lower value = more
high frequencies blocked) and reduce the possibility of oscillation. This filter is only active
if Differential is non-zero (Drive/Control screen).
The Differential Low-pass Frequency filter affects all differential frequency settings made on
the Drive Configuration/Control tab. If a differential adjustment is set to 0.0, it is unused and is
not affected by this filter setting.
• Process low-pass frequency: Filters higher frequency signals in the output of the speed
control loop. If the value is too high, oscillation may occur but the system is more respon-
sive. If the value is too low, control may become unresponsive. The typical, recommended
value is 999Hz.
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