Celexon HomeCinema Electric Tension screen, Operation Manual

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8
Operation of the screen
Using RS485
1) Mode of connection ( marked as 485-A white wire 485-B black wire )
2) Communication parameters
Baud rate:9600 data bits:8 stop bit:1 check bit:None
3) Communication protocol
Advice
485-A White cable
Start
code
Device address command
code
Command
value
Check code
(CRC16)
0x55 ID0 ID1 ID3 ID4 COMMAND DATA crcH crcL
1BYTE 1BYTE 1BYTE 1BYTE 1BYTE 1BYTE nBYTE 1BYTE 1BYTE
485-B Black cable
Start
code
Device address command
code
Command
value
Check code
(CRC16)
0xAA ID0 ID1 ID3 ID4 COMMAND DATA crcH crcL
1BYTE 1BYTE 1BYTE 1BYTE 1BYTE 1BYTE nBYTE 1BYTE 1BYTE
A) Start Code: 485-A 0x55
Start Code: 485-B 0xAA
B) 2 device address : 4 Bytes(ID0 is the highest , ID3 is the lowest),With a common
control, the device address is 0x0000000000. If the control occurs together and
the ID is not explicitly mentioned, 485-B does not respond.
C) Check code: Checked by CRC16(start code+device address + Command code+
Command value)