Fluke 5500A - Types of Commands; Device-Dependent Commands; Using Commands

Remote Operation
Using Commands 5
5-25
5-23. Using Commands
Communications between the controller and the 5500A Calibrator consists of
commands, queries, and interface messages. Although the commands are based on the
488.2 standard, they can be used on either the IEEE-488 or RS-232 interface, except for
a few specialized RS-232 commands described in “Commands for RS-232 Only.” (For
more information on command structures, see the IEEE 488.2 standard.)
Refer to Chapter 6, “Remote Commands” when you require additional information about
command references used this chapter.
All commands and units may be entered in UPPER or lower case.
There are four specific remote control configurations that use commands, queries and
interface messages: IEEE-488, RS-232 Terminal Mode, RS-232 Computer Mode, and
RS-232 Pass-Through Mode. (Setting up and testing each mode is discussed earlier in
this chapter.)
IEEE-488 Mode The IEEE-488 mode is used when the 5500A Calibrator is operated by
computer program. In this mode, requested information is returned by query, and
interface messages are queued and returned by command.
RS-232 Terminal Mode The RS-232 terminal mode is an interactive mode where an
operator inputs commands, with immediate returns for requested information (queries)
and interface messages.
RS-232 Computer Mode The RS-232 computer mode is used when the 5500A
Calibrator is operated by computer program. In this mode, requested information is
returned by query, and interface messages are queued and returned by command.
RS-232 Pass-Through Mode The RS-232 pass-through mode is used to pass
commands from the PC to a UUT, but via the 5500A Calibrator. This configuration is
used when the UUT has an RS-232 port. Commands are sent to the UUT by using the
UUT_SEND command, returns use the UUT_RECV? query, and UUT_FLUSH clears the
UUT receive buffer in the 5500A Calibrator.
5-24. Types of Commands
The commands for the 5500A Calibrator can be grouped into one or more categories,
depending on how they function. Each category is described below.
5-25. Device-Dependent Commands
Device-dependent commands are unique to the 5500A Calibrator. An example of a
device-dependent command is,
OUT 100 V, 1 A, 60 HZ
instructing the 5500A Calibrator to source 100 watts of ac power.