Chroma 19071 User Manual page 81

0x0E = Checksum
System Setting?
Description: It queries the system parameter.
Command code: 0xA9
Parameter: None
Return data: 7 bytes
Example:
Master (0x70): 0xAB 0x01 0x70 0x01 0xA9 0xE5
Slave (0x01): 0xAB 0x70 0x01 0x08 0xA9 0x08 0x01 0x01 0x01 0x00 0x00 0x01
0xD2
Descriptions of example
The setting meanings of HEX inputs are as the following:
0xAB = Header
0x01 = Destination Address
0x70 = Source Address
0x01 = Data Field Length
0xA9 = Command Code
0xE5 = Checksum
The reading meanings of returning HEX code are as the following:
0xAB = Header
0x70 = Destination Address
0x01 = Source Address
0x08 = Data Field Length
0xA9 = Command Code
0x08 = Contrast 8 (Return Data)
0x01 = Buzzer Volume Low (Return Data)
0x01 = EN50191 ON (Return Data)
0x01 = DC 50V AGC ON (Return Data)
0x00 = PASS ON OFF (Command Parameter)
0x00 = END OF STEP OFF (Command Parameter)
0x01 = END OF TIMER (Command Parameter)
0xD2 = Checksum
Key Lock
Description: It switches KEY LOCK status.
Command code: 0x2A
Parameter: 1 byte
0: key board lock OFF, recall key lock OFF
1: key board lock ON, recall key lock OFF
2: key board lock ON, recall key lock ON
Return data: Reply Message
Example: Master (0x70): 0xAB 0x01 0x70 0x02 0x2A 0x01 0x62
Slave (0x01): 0xAB 0x70 0x01 0x02 0x7F 0x00 0x0E
Descriptions of example
The setting meanings of HEX inputs are as the following:
0xAB = Header
0x01 = Destination Address
0x70 = Source Address
0x02 = Data Field Length
RS485 Interface (For Link Model of 19073 + RS485)
5-15