Ametek Land LMG MkII, User Manual, Page: 58 / 96

User Guide 5 - 8
Signal Processor LMG MkII
5.2.3 RS485 examples
The RS485 communications is designed primarily for use by a computer
running a customised communications package.
To read the temperature from channel ‘A’ ...
Type at the terminal [STX][addr]RATMP[ETX]
breakdown STX Binary 0x02, start of text framing character
addr Binary address of processor to be interrogated
R Read mode
A Channel A
TMP Command to report the temperature
ETX Binary 0x03, end of text framing character
reply [STX][addr]A1000C[ETX]
breakdown STX Binary 0x02, start of text framing character
addr Binary address of replying processor
A Channel ident of replying processor
1000C Temperature and units
ETX Binary 0x03, end of text framing character
To set the emissivity of channel ‘B’ to 0.5 ...
Type at the terminal [STX][addr]SBEMS 50[ETX]
breakdown STX Binary 0x02, start of text framing character
addr Binary address of processor to be interrogated
S Set mode
B Channel B
EMS Command to work on the emissivity value
50 New emissivity value
ETX Binary 0x03, end of text framing character
reply Will reply with “[channel letter]*” if command fails