2.1.8. GET Command

The GET command allows to read the current/voltage/power value at the output of the power unit and its ground current.

Command Format:

R/W	Command	Response	Description
R	GET:I:?	#GET:I:<output-I>	Return the output current read [A] - averaged values
R	GET:V:?	#GET:V:<output-V>	Return the output voltage read [V] - averaged values
R	GET:P:?	#GET:P:<output-P>	Return the output power read [W] (output current*output voltage) - averaged values
R	GET:I:SAMPLE:?	#GET:I:SAMPLE:<output-I>	Return the output current read [A] - the returned value is calculated using only 1 sample of the ADC
R	GET:V:SAMPLE:?	#GET:V:SAMPLE:<output-V>	Return the output voltage read [V] - the returned value is calculated using only 1 sample of the ADC
R	GET:P:SAMPLE:?	#GET:P:SAMPLE:<output-P>	Return the output power read [W] - the returned value is calculated using only 1 sample of the current ADC and 1 sample of the voltage ADC
R	GET:GC:?	#GET:GC:<ground-current>	Return the read ground-current [A] [1]
R	GET:AUX:?	#GET:AUX:<aux-voltage>	Return the voltage read on the aux input [V] - see Optional Boards to verify which boards have this input

Parameter(s):

Name	Type	Unit	Description
<output-I>	float string	[A]	Output Current read
<output-V>	float string	[V]	Output Voltage read
<output-P>	float string	[W]	Output Power read
<ground-current>	float string	[A]	Ground Current read
<aux-voltage>	float string	[V]	AUX Voltage read

Tip

• To improve the signal-to-noise ratio, the GET:I:? / GET:V:? / GET:P:? commands return values that are calculated using a 2-stage moving average filter.

  • The first moving-average stage has the length of 8 samples, the second filter has the length of 1024 samples.

  • The first filter is running at “native” frequency, which is for example 100 KHz for the FAST-Bi-1K5 family (see UPFREQ Command); the second filter is receiving decimated data (by a factor 4) from the first filter, the frequency is therefore for example: 100/4 = 25 KHz for FAST-Bi-1K5 family.

• The AUX Input signal is optional, so verify the Optional Boards section to verify which extension boards mount it. The AUX measuring range is bipolar: AUX ∊ [-10V, +10V].

Example(s):

GET:I:? 
#GET:I:5.48712

GET:V:SAMPLE:?  
#GET:V:SAMPLE:3.87698

GET:GC:?  
#GET:GC:0.1

---

[1]

The Ground Current read returns: a) the actual value when the module is in normal operation mode; b) the maximum read ground current value once the unit is in Ground Current fault state (so see which is the max ground current that tripped the fault). To restore the normal operation (module not in fault), it is necessary to reset the unit (REG:RESET command - see REG Command section).