User manual

63
© 2008, Elektro-Automatik GmbH & Co. KG
EN
About the interface cards
• Query and setting of set values are always dedicated to the currently selected „Level Control“. That is, if Level A is active
and mode CR is preselected, the set value sent with RES 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“.
For electronic loads applies: Resistance range 1 is the smaller one of the two resistance ranges
[SOURce:]
RESistance
(Resistange range 1 or 2, depending on what is currently active)
[:LEVel]? -><NRf>Unit Queries the last set value for internal resistance
Level A or B, depending on what is currently active
[:LEVel] <NRf+>[Unit] Sets the internal resistance
Level A or B, depending on what is currently active
:HIGH <NRf+>[Unit] Set value for power of Level A in Level A/B operation
:HIGH? -><NRf>Unit Query set value for power of Level A in Level A/B operation
:LOW <NRf+>[Unit] Set value for power of Level B in Level A/B operation
:LOW? -><NRf>Unit Query set value for power of Level B in Level A/B operation
Examples:
RES1.300 Sets the desired internal resistance set value to 1.3Ω.
RES:HIGH? Queries the least set resistance set value of Level A in Level A/B operation, of resistange range 1 or 2.
V. Set values for pulse width and rise time (Level A/B operation, electronic loads only)
(Specification according „1999 SCPI Command reference“:19 Source Subsystem)
Supported since firmware 3.01 and up.
The set values for the pulse widths of A (HIGH) and B (LOW), as well as the rise time can be queried anytime. Also see
items I. to IV. Setting them is only allowed if the, if Level A/B operation and remote control are activated. The time has to
be given in seconds. The ranges are determined like this:
Pulse width A or B: 0.0005s ... 100.0s
Rise time: 0.0003s ... 0.2s
This results in a period (=pulse width A + B) of 100µs...200s period time, which corresponds to 10kHz...0,005Hz. The duty
cycle is thus adjustable from 50µs to 100s or 0,025% to 99,975%.
Note: time values must always be given with decimal place, else an error is returned.
[SOURce:]
PULSe
:TRANsition[:LEADing]
<Time>[Unit] Set rise/fall time
:TRANsition[:LEADing]?
-><Time>Unit Query rise/fall time
:WIDTh
:HIGH
<Time>[Unit] Set pulse width Level A (higher level)
:HIGH?
-><Time>Unit Query pulse width Level A (higher level)
:WIDTh
:LOW
<Time>[Unit] Set pulse width Level B (lower level)
:LOW?
-><Time>Unit Query pulse width Level B (lower level)
Examples:
PULS:TRAN0.1s Sets 100ms rise/fall time, independently from the period time
PULS:WIDT:HIGH50 .0 Sets 50s pulse width for Level A