User manual

About the interface cards

Set value commands

Set values can also be read beack 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 manual of those devices!

I. Voltage set value/ Overvoltage threshold

(Specification according to „1999 SCPI Command reference“:19 Source Subsystem)

For electronic loads applies:

• Specific commands only for electronic loads are supported since 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

:LOW <NRf+>[Unit] Set voltage set value for Level B in Level A/B operation

:LOW? -><NRf>Unit Query voltage set value for Level B in Level A/B operation

:PROTection[:LEVel] <NRf+>[Unit] Set overvoltage (OVP) threshold (only if output is off)

:PROTection[:LEVel]? -><NRf>Unit Query the OVP threshold

Examples:

VOLT5.05 Sets 5,05V output voltage at a power supply resp. voltage limit at an e-load

VOLT6.91V Example with unit

VOLT?

Queries the last set value

SOUR:VOLT:PROT67 Sets the OVP threshold to 67V (PSI 9000 only), if the output of the device is off. Else the

command is ignored and an error is generated.

II. Current set value

(Specification according to „1999 SCPI Command reference“:19 Source Subsystem)

For electronic loads applies:

• Specific commands only for electronic loads are supported since 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 return an error in different level control modes.

• Query and setting of set values are always dedicated to the currently selected „Level Control“. That is, if Level A is active,

the set value sent with CURR is set for Level A etc. 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“.