KEPCO KLR Series Developers Guide - Manual (Page 117)

KLR-DEV 060713
B-15
B.56 [SOURce:]VOLTage:[LEVel:]TRIGgered[:AMPLitude] COMMAND
VOLT:TRIG
Syntax: Short Form: [SOUR:]VOLT:[LEV:]TRIG[:AMPL] MAX
Long Form: [SOURce:]VOLTage:[LEVel:]TRIGgered[:AMPLitude] MAX
= digits with decimal point and Exponent, e.g., 2.71E+1 for 27.1
Description: Programs voltage value to be transferred to output by *TRG commands. Actual output voltage
will depend on load conditions. VOLT:TRIG MAX programs output voltage value to be transferred by
*TRG to be the lower of VOLT:LIM:HIGH or 80% of VOLT:PROT. If the value exceeds the maximum for
the model being programmed, error message -222,”Data out of range” is posted in output queue. If
value exceeds VOLT:LIM:HIGH value, a value corresponding to the voltage limit will be programmed.
This value is automatically checked after execution of VOLT:LIM:HIGH and VOLT:PROT, and is set to
zero volts if there is a conflict. NOTE: A current trigger must be entered at least once. (See example,
Figure B-1.)
B.57 [SOURce:]VOLTage:[:LEVel]TRIGgered[:AMPLitude]? QUERY
VOLT:TRIG?
Syntax: Short Form: [SOUR]:VOLT[:LEV]:TRIG[:AMPL]? MAX
Long Form: [SOURce]:VOLTage[:LEVel]:TRIGgered[:AMPLitude]? MAX
Return Value: = digits with decimal point and Exponent, e.g., 2.71E+1 for 27.1
Description: Returns value representing voltage value to be programmed by *TRG command established by
VOLT:TRIG command). VOLT:TRIG? MAX returns maximum permissible value that can be pro-
grammed by VOLT:TRIG (the lower of VOLT:LIM:HIGH and 80% of VOLT:PROT) (See example, Fig-
ure B-1.)
FIGURE B-5. PROGRAMMING AS VOLTAGE STABILIZER
NOTE: The following example assumes KLR 75-32 with limit model set for 36V, 32A and output operat-
ing in voltage stabilization mode. See Figure B-3 for directions on programming limit model set-
tings.
VOLT 21.8;CURR .5 Programs output voltage for 21.8V, output current for 0.5A.
OUTP ON Enables output. NOTE: Load determines output operating mode; if
load resistance is greater than 21.8/0.5, output will operate as
voltage stabilizer.
MEAS:VOLT? Returns measured output voltage, approximately 2.18E1 (21.8V)
assuming voltage stabilizer operation.
VOLT? Returns 2.18E1 ( (21.8V, programmed output voltage).
VOLT 2.15 Programs output voltage to 2.15V.
VOLT? Returns 2.15E0 (2.15V, programmed output voltage).
VOLT? MAX Returns 3.6E1 (36V, the limit model voltage setting).
VOLT? MIN Returns 0 (minimum allowable program voltage).
VOLT:PROT 6.5 For this model, minimum overvoltage protection is 0.2 x 75 = 15V,
therefore power supply returns error message -222 (Data out of
range, ESR bit 4 =1) and the limit remains unchanged.
VOLT:PROT 25 Sets overvoltage protection limit to 25V.
VOLT:PROT? Returns 2.5E1 (25V).
VOLT 26 Returns error message -301 (Value bigger than limit, ESR bit 3=1)
and voltage setting remains unchanged at 2.15V.
VOLT:PROT?MAX Returns 9E1. Maximum allowable overvoltage protection limit for
model is 90V, 20% above maximum voltage (75V for KLR 75-32).