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REMOTE INTERFACES
Command Processing Overview
TP04300 Series Interface & Applications Manual 4-7
Section D:
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Command Processing
Command Processing Overview
• The System reads the message into a buffer until a Line Feed <LF> is received (or in
GPIB mode, the EOI line is set).
• After the <LF> (or EOI) is received, the System begins to process the commands/queries
in the message.
• The System will continue until all of the commands/queries in the message string are pro-
cessed.
• During processing of the message, the System will not transmit data. In GPIB mode, the
GPIB hardware handshake lines will prevent new data from being received. In Serial
mode, because there is no hardware handshaking, new data will be received into the input
buffer but will not be acted upon until processing of the current message is completed.
• When the entire message string has been processed, the System will transmit the
response(s) (separated by semicolons if there was more than one query message unit in the
string) to any queries.
• Although commands and queries are typically processed in less than 100 milliseconds, a
GPIB bus or Serial Interface timeout interval of 3 seconds is recommended.
• All commands/queries in multiple-command messages are processed sequentially. All
program messages are processed sequentially.
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