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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

Byte 7

Sync

Camera

Address

Command

Data

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

Sense

Reserved

Auto /

Manual

Scan

Command

Focus

Far

Zoom

Wide

Zoom

Tele

Tilt

Down

Bit 3

Bit 2

Bit 1

Bit 0

Command

Camera

On/Off

Iris

Open

Focus

Near

Command

Tilt

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

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