PN 305892901, Rev S
Conguring the 3050-RM Analyzer for Serial Communications
Protocol
The protocol used for the 3050-RM Analyzer is a master/slave, command/re-
sponse 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.
Node Address
Data
Check Sum
End Flag
Command Byte
Start Flag
• 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 eld is of variable length and contains ASCII characters.
• The checksum is a two-byte ASCII hexadecimal eld representing the
modulo 256 sum of Node Address, Command Byte, and Data elds (ex-
cludes the start ag).
• A master can issue a wildcard in lieu of a checksum.
Installation and Start-Up | 2-21
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