2012年3月14日 星期三

Pelco D message structure


Pelco D message structure

Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Synch Byte
Address
Command 1
Command 2
Data 1
Data 2
Check Sum

Byte 0 The synchronization byte is always $FF.


Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Cmd 1
Sense
0
0
Auto / Manual Scan
Camera On / Off
Iris Close
Iris Open
Focus Near
Cmd 2
Focus Far
Zoom Wide
Zoom Tele
Down
Up
Left
Right
0
Data 1
Pan Speed $00 to $3F and $40 for Turbo
Data 2
Tilt Speed $00 to $3F

Byte 6: checksum. The check sum is the sum of bytes (excluding the synchronization byte) modulo 256.


The sense bit (command 1 bit 7) indicates the meaning of bits 4 and 3.  If the sense bit is on, and bits 4 and
3 are on, the command will enable auto-scan and turn the camera on.  If the sense bit is off and bits 4 and 3
are on the command will enable manual scan and turn the camera off.  Of course, if either bit 4 or bit 3 are
off then no action will be taken for those features.
The reserved bits (6 and 5) should be set to 0.

EXTENDED COMMANDS
Command
Word 3
Word 4
Word 5
Word 6
Set Preset
00
03
00
01 to 20
Clear Preset
00
05
00
01 to 20
Go To Preset
00
07
00
01 to 20
Flip (180° about)
00
07
00
21
Go To Zero Pan
00
07
00
22
Set Auxiliary
00
09
00
01 to 08
Clear Auxiliary
00
0B
00
01 to 08
Remote Reset
00
0F
00
00
Set Zone Start
00
11
00
01 to 08
Set Zone End
00
13
00
01 to 08
Write Char. To Screen
00
15
X Position 00 to 28
ASCII Value
Clear Screen
00
17
00
00
Alarm Acknowledge
00
19
00
Alarm No.
Zone Scan On
00
1B
00
00
Zone Scan Off
00
1D
00
00
Set Pattern Start
00
1F
00
00
Set Pattern Stop
00
21
00
00
Run Pattern
00
23
00
00
Set Zoom Speed
00
25
00
00 to 03
Set Focus Speed
00
27
00
00 to 03

沒有留言:

張貼留言