8/16 Channel Digital Video Recorder
PTC2:
(seven byte)
Transmitting S.N
Transmitting worth
Instructions
Byte1 0x03
Fixed
byte
Byte2
0xaa
DVR identifier word
Byte3 0x01
Fixed
byte
Byte4
Device id
DVR device address
Byte5~7
Refer to PTC 1
Same command as PTC 1
PTC3:
(seven byte)
Byte1 Byte2
Byte3
Byt4
Byte5
Byte6
Byte7
0xFF Addr
Var1 Var2
Check
sum
Var1 Var2 Function
PELCO-D
0x00 0x08
Full/up Up
0x00
0x10
Quad/down
Down
0x00
0x04
Nine/left
Left
0x00
0x02
Hex/right
Right
0x04
0x00
Enter Iris
close
0x00
0x40
Record Zoom
wide
0x00
0x20
Play zoom
tele
0x02
0x00
Search Iris
open
0x00
0x80
Add Focus
far
0x01 0x00
Dec Focus
near
Byte 5 and byte 6 are ransom value from 0x00 to 0xff.
Byte 7 = mod [(byte2 + byte3 + byte4 + byte5 + byte6)/100]
Note:
This protocol is the same as PELCO-D, which is used to control speed dome. So, if you use
PELCO-D to control speed dome by a keyboard, you can also use the keyboard to control the
DVR through this protocol, we can use different address to distinguish the DVR and the speed
dome.
PTC4:
(eight byte)
Byte1 Byte2 Byte3 Byte4 Byte5
Byte6
Byte7 Byte8
0xa0 Addr 0x00 0x07 0x00
Var
0xAF Checksum
Byte8 = byte1 xor byte2 xor byte3 xor byte4 xor byte5 xor byte6 xor byte7
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