KEPCO KLP Series Developers Guide, Rev 3 - Manual (Page 116)

B-10
KLP 041213
FIGURE B-3. PROGRAMMING VIRTUAL MODELS
B.39 [SOURce:]CURRent:LIMit:HIGH? QUERY
CURR:LIM:HIGH?
Syntax: Short Form: [SOUR:]CURR:LIM:HIGH? (MIN | MAX)
Long Form: [SOURce:]CURRent:LIMit:HIGH? (MIN | MAX)
Return Value: = digits with decimal point and Exponent, e.g., 2.71E+1 for 27.1
Description: Returns value representing Virtual Model current limit. CURR:LIM:HIGH? returns the current limit
programmed by CURR:LIM:HIGH. CURR:LIM:HIGH? MAX returns the rated maximum programmable
current for that model (e.g., 33 (Amperes) for KLP 75-33. CURR:LIM:HIGH? MIN returns the minimum
allowable current that can be programmed.
Related Commands: CURR:LIM:HIGH, CURR. (See example, Figure B-3.)
B.40 [SOURce:]CURRent:MODE COMMAND
CURR:MODE
Syntax: Short Form: [SOUR:]CURR:MODE (FIX | LIST | TRAN,n,A]
Long Form: [SOURce:]CURRent:MODE (FIXed | LIST | TRANsient,n,A]
n = = time between 0.04 to 655.36 in seconds
A = = Current level in Amperes
Description: Allows the user to execute or stop a list, or to execute a transient. The default mode is FIX: the
power supply executes commands normally, and LIST commands can be issued to establish the
parameters and sequence of a list.
Two milliseconds after CURR:MODE LIST is issued, a list is executed (See LIST commands and
Figure B-2). While the list is being executed, LIST commands are not accepted and will produce a
command error. The 4- character front panel display shows
dLST when a list is executing.
Issuing CURR:MODE FIX while the list is running will stop the execution of the list and return power
supply to settings in effect prior to running the list. If the list runs to completion, the settings of the last
step of the list will be in effect.
CURR:MODE TRAN,, [R option (RODC installed) models only.] Two milliseconds after issu-
ing this command the KLP output current changes to the specified current level for the period of
time specified. At the end of time , the current is returned to the previously established value.
The status display shows
dLST during the execution of the transient. If any of the variables are incor-
rect, the transient is not generated, and an appropriate error message is generated (see Table B-5). If
CURR:MODE TRAN command is issued to a non-R option unit, error message -113, “undefined
header” is posted to the error queue. If current value is less than model minimum, the minimum value
is entered and no error is generated.
Related Commands: LIST commands. (See example, Figure B-2.)
NOTE: The following example assumes KLP 75-33-1200 with virtual model set for 75V, 16A and output
operating in voltage stabilization mode.
SYST:PASS:CEN 7533 Enables access to the protected commands. NOTE: Password
shown is factory default value for KLP 75-33-1200; values will
vary for other models (see Table B-4) and can be altered by user.
VOLT:LIM:HIGH? Returns 7.5E1 (75V, virtual model voltage rating).
VOLT:LIM:HIGH 70 Programs virtual model voltage to 70V.
VOLT:LIM:HIGH? Returns 7.0E1 (70V, new virtual model voltage rating).
CURR:LIM:HIGH? Returns 1.6E1 (16A, virtual model current rating).
CURR:LIM:HIGH 30 Programs virtual model current to 30A.
CURR:LIM:HIGH? Returns 3E1 (30A, virtual model current rating).
VOLT:LIM:HIGH? Returns 4 E1 (40V, new virtual model voltage rating). Since model
is limited to 1200W maximum output, programming the maximum
virtual model current to 30A automatically forces the maximum
voltage to be no more than 1200 / 30 = 40V.
VOLT:LIM:HIGH 33 Programs virtual model voltage to 30A. Virtual model limits are now
set to 33V and 30A.
SYST:PASS:CDIS 7533 Disables access to the protected commands (password value must
match).