KEPCO KLP Series Developers Guide, Rev 3 - Manual (Page 120)

B-14
KLP 041213
B.52 [SOURce:]VOLTage:MODE COMMAND
VOLT:MODE
Syntax: Short Form: [SOUR:]VOLT:MODE (FIX | LIST | TRAN,n,V
Long Form: [SOURce:]VOLTage:MODE (FIXed | LIST | TRANsient,n.V
n = = time between 0.04 to 655.36 in seconds
V = = Voltage level in Volts
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 VOLT:MODE LIST is issued, a list is executed (See LIST commands and Fig-
ure B-2). While the list is being executed, LIST commands are not accepted and will produce a com-
mand error.
Issuing VOLT: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.
VOLT:MODE TRAN,, [R option (RODC installed) models only.] Two milliseconds after issu-
ing this command the KLP output voltage changes to the specified voltage level for the period of
time specified. At the end of time , the voltage 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
VOLT:MODE TRAN command is issued to non-R option unit, error message -113, “undefined header”
is posted to the error queue.
Related Commands: LIST commands. (See example, Figure B-2.)
B.53 [SOURce:]VOLTage:MODE? QUERY
VOLT:MODE?
Syntax: Short Form: [SOUR:]VOLT:MODE? Long Form: [SOURce:]VOLTage:MODE?
Return value: FIXED or LIST or TRAN
Description: Identifies active voltage mode. Returns LIST while list is being executed. TRAN (transient) is not
supported at this time, contact Kepco for more information. Returns FIXED while in fixed (default)
mode of operation. Related Commands: LIST commands. (See example, Figure B-2.)
B.54 [SOURce:]VOLTage:PROTection[:LEVel] COMMAND
VOLT:PROT
Syntax: Short Form: [SOUR:]VOLT:PROT[:LEV]
Long Form: [SOURce:]VOLTage:PROTection[:LEVel]
= digits with decimal point and Exponent, e.g., 2.71E+1 for 27.1
Description: Sets overvoltage protection (OVP) level for power supply. Restricts valid programmable voltage to
be no greater than 80% of this setting, overriding virtual model voltage limit (VOLT:LIM:HIGH) when
overvoltage protection is less than 80% of the voltage limit. Valid range is 20% to 120% of rated model
maximum voltage (e.g., 15V to 90V for KLP 75-33)
After executing VOLT:PROT, the Output is set to OFF and previously stored trigger levels are reset
to zero volts and minimum current.
If the programmed OVP value is out of the acceptable overvoltage range for the power supply
model, error message -222,”Data out of range” is posted in the output queue. If the power supply out-
put exceeds the voltage protection level programmed, then the power supply output is disabled (pro-
grammed to 0V, minimum current) and the OVP bit in the Questionable Condition status register is set.
The value of VOLT:PROT is automatically recalculated if VOLT:LIM:HIGH is executed. (See example,
Figure B-5.)
B.55 [SOURce:]VOLTage:PROTection[:LEVel]? QUERY
VOLT:PROT?
Syntax: Short Form: [SOUR:]VOLT:PROT[:LEV] MIN, MAX
Long Form: [SOURce:]VOLTage:PROTection[:LEVel] MIN, MAX
Return Value: = digits with decimal point and Exponent, e.g., 2.71E+1 for 27.1
Description: Identifies overvoltage protection setting, maximum allowable overvoltage protection, or mini-
mum overvoltage protection. VOLT:PROT? returns value set by VOLT:PROT. VOLT:PROT? MAX
returns maximum voltage protection value; this value is determined at the factory and cannot be
changed by the user. VOLT:PROT? MIN returns the minimum voltage protection value (0.2 x model
voltage, e.g., 1.5V for KLP 75-33). (See example, Figure B-5.)