Pelco Pan/Tilt Heads

The commands of the Pelco system are not compatible with the commands of the KDec system. A complete conversion must take place.

Conversion is performed on the basis of the "D" protocol from Pelco. This is described in the following table of figures.

Speed-dependent pan/tilt commands can be used. The Pelco system understands up to 64 speed levels for both movements. The 255 levels of the KDec system will be converted accordingly.

Number of fixed positions: 32, for use of expanded functions of the dome only 22 incl. home position (home position = 1)

Available camera numbers: 1...32

Meaning of variables:
• kkk = Insert number of the dome camera, possibly with leading zeros.
• pp = Insert fixed position of the dome camera, possibly with leading zeros.
• vvv = Additional variable speed parameters.

Pelco function

KDec command

MBeg

MBeg/VS

Pan right

SNkkkS-

Key (stop = release)

With joystick

Pan left

SNkkkS+

Tilt down

SNkkkN-

Tilt up

SNkkkN+

Tilt up/down, pan right/left at variable speed

SNkkk++

Press and hold key

Automatic with joystick

Tilt up/down, pan right/left at normal speed

SNkkk--

Release key

Focus near

SNkkkF-

Focus near

Focus rocker switch

Focus far

SNkkkF+

Focus far

Focus rocker switch

Focus stop

SNkkkF0

Release /

Release Focus

Zoom wide

SNkkkZ-

Zoom wide

Zoom rocker switch

Zoom tele

SNkkkZ+

Zoom tele

Zoom rocker switch

Zoom stop

SNkkkZ0

Release /

Release Zoom

Iris open

SNkkkB-

Press and hold key (stop = release)

Iris close

SNkkkB+

Press and hold key (stop = release)

Store preset or home position

PPkkk.pp

Program preset (1 – 32),

Home position = 1

The Pelco system understands a number of special fixed positions with which you can access advanced dome functions. Some of them are in the range 90-99 and are therefore not accessible with MBeg. With a DIP switch, however, they can be shifted to the range 23-32. In this case, these positions are not available for other uses.

Fixed positions

Function

1

Park position (also BASE_POSITION). If this preset is set and the dome receives no command within the set time in the OSD, it automatically returns to this position. This function can be disabled by setting a time of "0" in the OSD (default). During the auto-pan process, this feature is also disabled.

1… 22

Fixed position.

35

By setting this preset position, the dome is put into a mode to record a sequence of pan/tilt/focus/zoom commands. The following commands sent to the dome are stored in the dome-internal buffer. As long as the buffer has enough space, the message "Programming pattern" appears in the camera image. If the buffer is full, the text display disappears. The end of the programming will be reported to the Dome by the fixed position 36. By retrieving the  fixed position 35 the most recently recorded sequence of commands is performed.

36

By setting this fixed position, the end of programming ("Programming pattern"/fixed position 35) is initiated.

Pelco function

KDec command

 

Move to a fixed position

SNkkk.pp

Move to fixed position (1-32).

Fixed position

Function

1… 22

Fixed position.

23/90

Left manual limit stop.

24/91

Right manual limit stop.

25/92

Left scan limit stop.

26/93

Right scan limit stop.

27/94

Undefined

28/95

OSD menu. By setting this preset you can access the OSD menu. Navigation is performed using the joystick (up/down), "Open Iris" (select) and "Close Iris" (cancel). The menu has the following structure:

  • Limits

  • Limit Stops

  • Set Man Limits

  • Clear Man Limits

  • Set Scan Limit

  • Clear Scan Limit

  • Exit

  • Other

  • Park Time

  • Pan/Scan Speed

  • Power Up

  • Pattern Length

  • Speed Profile

  • Exit

  • "Pan/Scan Speed" is the "Autopan"-speed (3-40°/s). The tilt rate is half of the pan speed.

  • "Power Up" is the behavior after being turned on: (Date display, park position, auto-pan, etc ...)

  • "Speed ​​Profile" takes into account the wind conditions at the site. This affects the speed when moving to the fixed positions and the flip procedure. The following values ​​are possible: 100°/s (50 mph) and 60°/s (90 mph).

29/96

Stop scan. Stop autopan.

30/97

Random scanning. Random autopan.

31/98

Frame scanning. 3 s autopan, 3 s pause, etc.

32/99

Patrol Auto scanning. Continuous autopan.

33

Flip command. By selecting this position, the dome rotates 180°.

34

Camera home position Pan zero command. Move to the home position.

35

Run pattern.

Pelco function

KDec command

 

Move to home position

SNkkkGP

Press button

IMPORTANT: The left limit stop must always be set before the right limit stop. Setting the left and right limit stops to the same position deactivates the limit stops. All limit functions can also be performed using the OSD menu.