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Configuring the 3050-AMS Analyzer for Serial Communications
Protocol
The protocol used for the 3050-AMS Analyzer is a master/slave, command/
response communication with the master initiating all transfers. The message
format for transfers initiated by the master is illustrated in Figure 2-15.
Figure 2-15.
Message format for transfers
initiated by the master.
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2-22 | 3050-AMS Moisture Analyzer
Node Address
Start Flag
Command Byte
All elements of this protocol are sent as ASCII characters.
The Start Flag is the character '>' , $3E.
The End Flag is a carriage return, $0D.
The Node address is a two byte hexadecimal ASCII value in the range $00
through $EF.
Addresses $F0 through $FF are reserved.
The command byte is a single ASCII character.
The Data field is of variable length and contains ASCII characters.
The checksum is a two byte ASCII hexadecimal field representing the
modulo 256 sum of Node Address, Command Byte, and Data fields (ex-
cludes the start flag).
A master can issue a wildcard in lieu of a checksum.
Data
Check Sum
PN 305804902, Rev A
End Flag
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