Samsung SCR-3000N Manual De Instrucciones página 170

DIGITAL VIDEO RECORDER
Connection with RS-485
If you control cameras, remote control is allowed through connection with RS-485 (up to
1.2km).
A. Communication method
Data transmission method: Start-Stop Asynchronized Serial Interface
Protocol: 8 bit Data, 1 Stop bit, None Parity
Transmission speed: 4800, 9600, 19200, 38400, 115200 bps
B. RS-485 terminal and Pin specifications
DATA +
DATA -
DATA -
DATA +
C. Data Format (Samsung Protocol)
Start Code (A0H) Start Addr.
(1) (1)
Data Byte Type
Byte 1 Start Code
Byte 2 Sender Addr.
Byte 3 Target Addr.
Byte 4 Only Image Recorder Command
Byte 5
Byte 6 Command
Byte 7
Byte 8
Byte 9 Check Sum
2-5
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( ) : Byte numbers
9 Byte Fixed
Target Addr. Command Check Sum
(1) (5) (1)
Contents Remarks
0xA0 Start of Data Packet
Transmission Address Source Range (0x00 ~ 0xFF)
Reception Address Destination Range (0x00 ~ 0xFF)
0x0A
Key Function Range (0x01 ~ 0xFF)
0xFF 0xFF
0xFF 0xFF
0xFF 0xFF
Lower byte of (0xFFFF - (values adding Byte 2 ~ Byte 8))
D. Code value by key
Function Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
[SET COMMAND]
RECORD 0xA0 Src.Addr Dest.Addr. 0x1A 0x0B
REC LOCK 0xA0 Src.Addr Dest.Addr. 0x1A 0x0A
VCR 0xA0 Src.Addr Dest.Addr. 0x1A 0x3D
SEARCH 0xA0 Src.Addr Dest.Addr. 0x1A 0x02
MENU 0xA0 Src.Addr Dest.Addr. 0x1A 0x01
ENTER 0xA0 Src.Addr Dest.Addr. 0x1A 0x35
LEFT 0xA0 Src.Addr Dest.Addr. 0x1A 0x06
RIGHT 0xA0 Src.Addr Dest.Addr. 0x1A 0x07
STOP 0xA0 Src.Addr Dest.Addr. 0x1A 0x08
RIGHT 0xA0 Src.Addr Dest.Addr. 0x1A 0x09
UP 0xA0 Src.Addr Dest.Addr. 0x1A 0x04
DOWN 0xA0 Src.Addr Dest.Addr. 0x1A 0x05
EJECT 0xA0 Src.Addr Dest.Addr. 0x1A 0x3E
E. Others
Above data format and transmission speed may be changed depending on future
development conditions.
PC operates as Master, and Target Set as Slave in transmission/reception of data.
No status other than Set Key Function should be received.
(Some delay can be happen due to communication speed).
Response
Byte 6, 7, 8 Byte 9
(Byte 5)
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
0xFF Check Sum Byte 5
2-6