Cirrus DESIGN SR20 Information Manual page 332

Section 9 Cirrus Design
Supplements SR20
(-) value indicates descent. Vertical speed can be adjusted by rotating
the VS knob on the programmer/computer. Clockwise rotation
increases and counterclockwise rotation decreases rate of climb (or
descent) 100 FPM for each 'click.' The maximum adjustment is ±1600
FPM.
16 of 16 P/N 11934-S13
Revision 04: 08-15-07