2012年3月14日 星期三

Pelco P message structure


Pelco P message structure



Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
STX
Address
Data 1
Data 2
Data 3
Data 4
ETX
Check Sum


Byte 0 is always $A0
Byte 6 is always $AF

Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Data 1
0
Camera On
Autoscan On
Camera on / off
Iris Close
Iris Open
Focus Near
Focus Far
Data 2
0
Zoom Wide
Zoom Tele
Tilt Down
Tilt Up
Pan Left
Pan Right
0 (for pan / tilt)
Data 3
Pan Speed $00 to $3F and $40 for Turbo
Data 4
Tilt Speed $00 to $3F

Byte 8: checksum. XOR sum of Bytes 1-7

EXTENDED COMMANDS
Command Data byte 1 Data byte 2 Data byte 3 Data byte 4
Set Preset XX 00 03 00 01 to FF
Clear Preset XX 00 05 00 01 to FF
Go To Preset XX 00 07 00 01 to FF
Flip (rotate 180º) 00 07 00 21
Zero Pan Position 00 07 00 22
Auto scan 00 09 00 00
Stop auto scan 00 0B 00 00
Remote Reset 00 0F 00 00
Zone Start 00 11 00 01 to 08
Zone End 00 13 00 01 to 08
Write char to screen 00 15 0 to 28 0 to 7F
Clear Screen 00 17 00 00
Alarm Ack 00 19 00 01 to 08
Zone Scan On 00 1B 00 00
Zone Scan Off 00 1D 00 00
Pattern Start 00 1F 00 00
Pattern Stop 00 21 00 00
Run Pattern 00 23 00 00
Zoom Lens Speed 00 25 00 00 to 03
Focus Lens Speed 00 27 00 00 to 03

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