8/16 Channel Digital Video Recorder
63
PTC2:
(seven-byte)
Transmitting S.N.
SPECS for
Transmitting
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 have random values 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 the speed domes. If PELCO-D
is used to control speed domes via a keyboard, the keyboard can be used to control the DVR through this
protocol. Different addresses can be used to distinguish the DVR and the speed domes.
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