KEPCO BOP 1000W, Operator'S Manual

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BOP-1K 080709
B-5
B.12 MEMory:UPDate COMMAND
MEM:UPD
Syntax: Short Form: MEM:UPD {INT | LIM | SER | CONT | OUTP}
Long Form: MEMory:UPDate {INTerface | SERial | LIMits | CONTrast | OUTPut}
Description: Saves selected variables. MEM:UPD INT saves GPIB address, Language (SCPI or CIIL) and all
SYST:SET (PAR. B.142) variables. MEM:UPD SER saves the serial communication state, baud rate,
pace control and echo information. MEM:UPD LIM saves limits for voltage and current and the maxi-
mum allowable protection values for voltage and current. MEM:UPD CONT saves the display contrast
and background settings for the next power-up cycle. MEM:UPD OUTP saves the power supply on/off
state and the mode of operation. Related commands: SYST:COMM:GPIB:ADDR, SYST:LANG,
SYST:SET, VOLT:LIM, CURR:LIM, CURR:PROT:LIM, VOLT:PROT:LIM. See PAR. 3.5.2.2 and Figure
3-16 for special programming considerations.
FIGURE B-2. USING LIST COMMANDS TO MEASURE SAMPLE AT END OF PULSE
NOTES: 1. The power supply is assumed to be operating in constant voltage mode.
2. This example creates a 5-Ampere, 100-millisecond current pulse and performs a current mea-
surement during the last five milliseconds of the pulse.
list:cle Clear list.
list:set:sample .0003125 establishes the sample timing. The value was determined by dividing the
sample time (0.005S) by the number of samples (16):
(0.005/16 = 0.0003125).
list:curr:appl level,.095,5 Creates the initial part of the current pulse. The time duration (0.0950000)
establishes where the sample is to begin. It is determined by multiplying
the (time per sample) x (number of samples) and subtracting it from the
total time of the pulse (100 milliseconds):
[0.1 - (.0003125 x (16) ) = .0950000]
list:sample:curr 16,5 Creates the sample of the waveform. The output level is 5 amperes and
the number of samples is 16.
list:sample? Returns 60C indicating one sample will be taken after 60 points of a cur-
rent list (indicated by the C).
list:curr:apply level,.001,0 Creates the end of the current pulse.
list:count 1 Sets the number of loops to one. NOTE Count MUST be set to 1 when
measuring a sample, otherwise error -100 “command error” will result.
NOTE: The following five commands execute the function:
func:mode curr Sets unit to constant current mode.
curr 0 Sets current to 0 Amperes.
volt 10 Sets voltage to 10 Volts.
outp on Sets the output to ON.
curr:mode list Causes the list to be executed. Note that the four prior commands ensure
that the unit is working in current mode and has its output on before the
current pulse is sent.
Meas:tran? After executing the list, this query returns the measured value of the sam-
ple, e.g., 5.0003E0 (5.0003 Amperes).