26
Modbus Protocol
Communication Control
1. SYSTEM CONDITION CHECK
Baud rate
Data Frame
Parity
Code
04h
2
R
unsigned 16
30000
System Status Check
Slave No.
지정
RS-485 MODBUS PROTOCOL
9600, 19200 bps
1 Start bit, 8 Data bit, 1 Stop bit
Non Parity
1
~
99 (Device Setting)
Bytes
Data Mag.
R/W Unit
Address
Parameter
Data HI
bit 15 ~ bit 8 Reserved
Data LOW
bit 7 ~ bit 4 Reserved
bit 3 Channel 4
bit 2 Channel 3
bit 1 Channel 2
bit 0 Channel 1
(0=Abence, 1=Presence)
Data Type
2. SYSTEM SETTING & VOLUME CHECK
Code
04h
2
R
unsigned 16
30001
System Status Check
Bytes
Data Mag.
R/W
Unit
Address
Parameter
Channel 1
Data HI
bit 15 ~ bit 8 Reserved
Data LOW
bit 7~ bit 5 Reserved
bit 4 Battery MOde
bit 3 Sleep Mode
bit 2 Mute
bit 1 Output Limit
bit 0 Power
(0= OFF, 1=ON)
Data Type
3. SYSTEM SETTING CHECK & VOLUME CHECK
Code
04h
2
R
unsigned 16
30005
System Setting Check
Bytes
Data Mag.
R/W
Unit
Address
Parameter
Channel 1
Data HI
bit 15 ~ bit 8 Reserved
Data LOW
0~99 Volume SET
Data Type
30002
Channel 2
Channel 3
Channel 4
30003
30004
30006
Channel 2
Channel 3
Channel 4
30007
30008
