Cirrus DESIGN SR22 Pilot Operating Handbook page 462

Section 9
Supplements
the aircraft. If the autopilot is still in the process of automatically
trimming the aircraft after four more seconds, the annunciation will
flash. When the aircraft has been sufficiently trimmed, the
annunciation will extinguish.
VS Modifier Knob
The VS Knob on the Programmer/Computer is used to change the
vertical speed when in vertical speed mode and controls altitude
reference when in altitude hold mode. Each 'click' of the knob results
in a step increase or decrease in the selected mode by the amount
shown in the table below.
Mode
Altitude Hold (ALT)
Vertical speed (VS)
* Adjustments greater than 360 feet can be made by selecting VS mode and flying
the airplane to the new altitude and then re-engaging ALT mode
Flight Management System Keyboard
The Flight Management System Keyboard, found in the center console
above the programmer / computer, is the primary means for data entry
for the MFD and is used to control NAV/COM Radios, transponder,
and flight management system entry. Heading, course and altitude
select are also provided.
28 VDC for Flight Management System Keyboard operation is
supplied through 5-amp KEYPADS / AP CTRL circuit breaker on MAIN
BUS 1.
HDG - Heading Knob.
The HDG knob controls the selected heading bug on the HSI portion
of the PFD. It provides the reference for heading select mode. Pushing
the HDG knob synchronizes the selected heading to the current
heading.
CRS - Course Knob
The CRS knob controls the course pointer on the HSI portion of the
PFD. Pushing the CRS knob re-centers the CDI and returns the
course pointer to the bearing of the active waypoint or navigation
station.
16 of 20
Step Value
20 Feet
100 Feet per Minute
Cirrus Design
SR22 / SR22T
Range
+/- 360 Feet*
+/- 1600 Feet per Minute
P/N 13772-141
Revision 01: 01-06-10