Programmable AC/DC Electronic Load 63800 Series Operation & Programming Manual
8.3 Introduction to Programming
All commands and response messages are transferred in form of ASCII codes. The response
messages must be read completely before a new command is sent, otherwise the remaining
response messages will be lost, and a query interrupt error will occur.
8.3.1 Conventions
Angle brackets < > Items in angle brackets are parameter abbreviations.
Vertical bar | Vertical bar separates alternative parameters.
Square brackets [ ] Items in square brackets are optional. For example,
FETCh[:SCALar] means that :SCALar may be omitted.
Braces { } Braces indicate the parameters that may be repeated.
The notation <A> {<, B>} means that parameter “A” must
be entered while parameter “B” may be omitted or entered
once or more times.
8.3.2 Numerical Data Formats
All data programmed to or returned from the AC Load are ASCII. The data can be numerical
or character string.
Numerical Data Formats
It is a digit with no decimal point. The decimal is assumed
to be at the right of the least significant digit.
It is a digit with a decimal point.
8.3.3 Boolean Data Format
The Boolean parameter <Boolean> takes only the form ON|OFF.
8.3.4 Character Data Format
The character strings returned by query command may take either of the following forms:
The AC Load sets the SRQ line true if there is an enabled
service request condition.
The AC Load powers up in local state. In local state, the
front panel is operative, and the AC Load responds to the
commands from GPIB. In remote state*, all front panel
keys except the “<CONF./LOCAL>” key are disabled.
Press “<CONF./LOCAL>” key to return the AC Load to
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