User manual
70
© 2009, Elektro-Automatik GmbH & Co. KG
EN
About the interface cards
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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:
VOLT5.05 Sets 5,05V output voltage at a power supply resp. voltage limit at an e-load
VOLT6.91V Example with unit
VOLT?
Queries the last set value
SOUR:VOLT:PROT67 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“.
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CURRent
[:LEVel]? -><NRf>[Unit] Queries the last set value for current
Level A or B, depending on what is currently active
[:LEVel] <NRf+>Unit Set current
Level A or B, depending on what is currently active
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CURRent
:HIGH <NRf+>[Unit] Set value for current of Level A in Level A/B operation
:HIGH? -><NRf>Unit Query set value for current of Level A in Level A/B operation
:LOW <NRf+>[Unit] Set value for current of Level B in Level A/B operation
:LOW? -><NRf>Unit Query set value for current of Level B in Level A/B operation
Examples:
CURR20.00 Sets 20A output or input current, depending on the device type
CURR:HIGH? Queries the Level A set value for current in Level A/B operation
SOUR:CURR:LOW0.4A Sets the set value for current of Level B in Level A/B operation to 0.4A