American Dynamics MegaPower 3200, User Manual

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MEGAPOWER 3200 EXTENDED DOME/PTZ CAMERA PROTOCOL 8200-0421-23, REV. A
USER GUIDE
15 of 25
Appendix C: Pelco-D Protocol
Features
Table 11 identifies the camera control functions
available in the Pelco-D protocol.
Table 11. Pelco-D function commands
Function Capability/Capacity
Pan
Variable Speed
Tilt Variable Speed
Zoom In Single Speed
Zoom Out
Single Speed
Flip
19-F1 (see Note 1)
Focus Near Single Speed
Focus Far Single Speed
Iris Open
Single Speed
Iris Close Single Speed
Define Pattern Max.
Permitted
3 Patterns
Call Pattern 3 Patterns (see Note 2)
Repeat Patterns
3 Call Run Patterns
(see Note 2)
Define Preset Max.
Permitted
42 Presets
Call Preset 42 Presets
Notes:
1) In addition to "19" followed by the "F1" key, the
AD2089 joystick top and Control Center keyboard
special keys also issue the Flip command.
2) The Call Pattern function will repeat the Pattern
and not run a single run of the Pattern.
Table 12 identifies the keyboard dome commands
available in the Bosch Pelco-D protocol.
Table 12. Bosch Pelco-D keyboard dome
commands
Keyboard Dome Menu Access Commands
AD2089 1
→ HOLD → IRIS OPEN
ADCC1100
Tab Key T2
→ 95 → PRESET
soft key → FOCUS FAR
ADCC300 → 95 → IRIS OPEN
ADTTE 1
→ HOLD → IRIS OPEN
Note: Configuration UI also can be accessed by going
into Keyboard programming mode and typing "95
Preset".
Format
The Pelco-D command string uses 7 hexadecimal
bytes; that is, each data byte is in hexadecimal
format. For example, Hex 06 and 12 represents
decimal numbers 06 and 22 respectively.
Table 13 outlines the Pelco-D format.
Table 13. Pelco-D command string format
Byte 1 Byte 2 Byte 3 Byte 4
Byte
5
Byte
6
Byte 7
Sync Camera
Address
Command
1
Command
2
Data
1
Data
2
Check-
sum

Byte 1 (Sync)
– the synchronization byte, fixed to FF

Byte 2 (Camera Address) - logical address of the
camera being controlled (Address 1 is 01)

Byte 3 and 4 (Command 1 and 2)
– see Table 14

Byte 5 (Data 1)
– pan speed, range from 00 (stop) to
high speed) and FF for “turbo” speed (the maximum
pan speed that the device can go)

Byte 6 (Data 2)
– tilt speed, range from 00 (stop) to 3F
(maximum speed)

Byte 7 (Checksum)
– sum of bytes (excluding the
synchronization byte), then mod 100 (Decimal code:
256)
Table 14. Calculate Pelco-D camera control
hexadecimal bit values for Bytes 3 and 4
Bit 7 Bit 6 Bit 5 Bit 4
Command
1
Sense Reserved Reserved
Auto /
Manual
Scan
Command
2
Focus
Far
Zoom
Wide
Zoom
Tele
Tilt
Down
Bit 3 Bit 2 Bit 1 Bit 0
Command
1
Camera
On/Off
Iris
Close
Iris
Open
Focus
Near
Command
2
Tilt
Up Pan
Left
Pan
Right
Fixed
to 0
Note: American Dynamics has operated with the
following dome models:

Spectra II Model VDD5BC Ver. 3.31 with housing
BB5A-PG-E

Spectra III Model DD53CDW

Spectra III Model DD53TC16

Spectra IV SE Model DD4CBW35

Spectra IV SE Model DD4C22 Ver. V1.072 with
Back Box BB4-F