User manual

LABKON Series
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GMC-I Messtechnik GmbH 31
4.6 Using the MIN and MAX Parameters
You can substitute MINimum or MAXimum for the parameter of many commands. For example, consider the following
command:
CURRent {<current>|MIN|MAX}
Instead of selecting a specific current, you can substitute MINimum to set the current to its minimum value or MAXimum to
set the current to its maximum value.
4.7 Querying Parameter Settings
You can query the value of most parameters by adding a question mark (?) to the command. For example, the following
command sets the output current to 5A
CURR 5
You can query the value by executing:
CURR?
You can also query the minimum or maximum value allowed with the present function as follows:
CURR? MAX
CURR? MIN
4.8 SCPI Command Terminators
A command string sent to the power supply must terminate with a <new line> character. The IEEE-488 EOI (end-or-identify)
message is interpreted as a <new line> character and can be used to terminate a command string in place of a <new line>
character. A <carriage return> followed by a <new line> is also accepted.
4.9 SCPI Parameter Types
The SCPI language defines several different data formats to be used in program messages and response messages.
Numeric Parameters: Commands that require numeric parameters will accept all commonly used decimal representations of
numbers including optional signs, decimal points, and scientific notation. Special values for numeric parameters like
MINimum, MAXimum, and DEFault are also accepted. You can also send engineering unit suffixes (V, A or SEC) with
numeric parameters. If only specific numeric values are accepted, the power supply will automatically round the input
numeric parameters. The following command uses a numeric parameter:
CURR {<current>|MINimum|MAXimum}
Discrete Parameters: Discrete parameters are used to program settings that have a limited number of values (like BUS,
IMM). Query responses will always return the short form in all capital letters. The following command uses discrete
parameters:
TRIG:SOUR {BUS|IMM}
Boolean Parameters: Boolean parameters represent a single binary condition that is either true or false. For a false condition,
the power supply will accept “OFF” or “0”. For a true condition, the power supply will accept “ON” or “1”. When you query a
boolean setting, the power supply will always return “0” or “1”. The following command uses a boolean parameter:
DISP {OFF|ON}
String Parameters: String parameters can contain virtually any set of ASCII characters. A string must begin and end with
matching quotes; either with a single quote or with a double quote. You can include the quote delimiter as part of the string by
typing it twice without any characters in between. The following command uses a string parameter:
DISPlay:TEXT <quoted string>