25
EN
Instruction Manual
SCPI Commands for Electronic Loads
Date: 23-07-2015
SCPI
3.6 Commands to control the input
Activate/deactivate the power input.
INPut[:STATe]?
->B0 Queries the state of the electronic load input
INPut[:STATe]
<B0> Switches the electronic load input on/off
Examples:
INP
ON
Switches the power input on, but does not reset alarms or warnings. It means, if an alarm is
persistent the command can‘t be executed.
3.7 Measurement commands
Used to read the latest measured results (actual values).
MEASure
[:SCALar]
:VOLTage[:DC]?
-><NRf>Unit
Query:
Actual
voltage
value
:CURRent[:DC]?
-><NRf>Unit
Query:
Actual
current
value
:POWer[:DC]?
-><NRf>Unit
Query:
Actual
power
value
:[ARRay]?
-><NRf>Unit, <NRf>Unit … Query: Actual voltage, actual current, actual power
Examples:
MEAS:CURR?
Measures the actual current resp. returns its average value.
MEAS:ARR?
Returns a set of actual values. These are: U, I, P
3.8 Set value commands
Note
Set values can also be read back by attaching a question mark to the command. For the meaning of A, B and A/B mode
at the electronic loads please also read the user guide of those devices!
I. Voltage set value/ Overvoltage threshold
(Specification according to „1999 SCPI Command reference“:19 Source Subsystem)
For electronic loads applies:
• These commands are supported since device firmware 3.01 and up
• the HIGH set value always has to be greater than the LOW set value, else an error is generated. The commands HIGH
and LOW are only valid for Level A/B operation and will generate an error in different level control modes.
• Query and setting of set values are always dedicated to the currently selected „Level Control“ and the preselected „Mode“.
That is, if Level A is active, the set value sent with VOLT is set for Level A etc., but only if mode CV is preselected. Else the
set value is ignored and an error is generated. The control mode has to be selected before the device is set into remote
operation mode. The other set values, not belonging to the preselected mode, can not be set anymore and have to be
preset. Thus, for continuous remote control of the device, we recommend to set the option „Keep set values“ in the setup
menu to „no“, hence the set values are reset to default values when switching „Mode“.
[SOURce:]
VOLTage
[:LEVel]
?
-><NRf>Unit
Queries the last set value for voltage
Level
A
or
B,
depending
on
what
is
currently
active
[:LEVel]
<NRf+>[Unit]
Set voltage
Level
A
or
B,
depending
on
what
is
currently
active
:HIGH
<NRf+>[Unit]
Set voltage set value for Level A in Level A/B operation
:HIGH?
-><NRf>Unit
Query voltage set value for Level A in Level A/B operation
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