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B.12 MEMory:UPDate COMMAND
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.
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
list:set:sample .0003125
list:curr:appl level,.095,5
list:sample:curr 16,5
list:sample?
list:curr:apply level,.001,0
list:count 1
func:mode curr
curr 0
volt 10
outp on
curr:mode list
Meas:tran?
FIGURE B-2.
BOP-1K 080709
Clear list.
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).
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]
Creates the sample of the waveform. The output level is 5 amperes and
the number of samples is 16.
Returns 60C indicating one sample will be taken after 60 points of a cur-
rent list (indicated by the C).
Creates the end of the current pulse.
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:
Sets unit to constant current mode.
Sets current to 0 Amperes.
Sets voltage to 10 Volts.
Sets the output to ON.
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.
After executing the list, this query returns the measured value of the sam-
ple, e.g., 5.0003E0 (5.0003 Amperes).
USING LIST COMMANDS TO MEASURE SAMPLE AT END OF PULSE
MEM:UPD
B-5
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