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Operation
Command Reference
Release 1.1 47
Command Description
TRG Causes programmed voltage and current settings which had been in hold
mode to be applied. The supply operates with previous values until the TRG
(trigger) command is sent.
UNMASK <mnemonics> Selects the supply operating conditions that you are most interested in
monitoring for fault occurrence. Mnemonics describing the conditions are
separated from each other by commas, and may be sent in any order.
Specifying one or more mnemonics which describe the conditions (or the
decimal equivalent of their total bit weight) enables the selected conditions
to set bits in the supply’s fault and status registers during operation. A bit is
set in the fault register when the corresponding bit in the status register
changes from 0 to 1 and the corresponding bit in the mask register is 1. See
“Accumulated Status, Status, and Fault Registers” on page 49.
Mnemonics: CV, CC, OV, SD, FOLD, ERR, ALL, NONE
Initial value: UNMASK NONE
UNMASK? Returns the supply's fault conditions which are currently enabled
(unmasked).
Response: UNMASK <fault mask> where fault mask is the decimal
equivalent of the total bit weights for the operating conditions as listed in the
status and fault registers See
“Accumulated Status, Status, and Fault
Registers” on page 49
.
VDATA <Vlo>,<Vhi> Calculates and records the slope and offset for programmed voltage using
VLO and VHI data. Set CMODE ON before using this command. See also
the calibration procedures in Section 4.
<Vlo> and <Vhi> are in <voltage> format.
VHI In response to this command, the power supply sends a programmed
voltage value to the output terminal. This value is at the high end of the
power supply’s voltage range and is read by an external device connected
as part of the calibration procedure. Refer to this value as VHI and record it
to use as input with the VDATA command. Set CMODE ON before using
this command. See also the calibration procedures in Section 4.
VLO In response to this command, the power supply sends a programmed
voltage value to the output terminal. This value is at the low end of the
power supply’s voltage range and is read by an external voltmeter
connected as part of the calibration procedure. Refer to this value as VLO
and record it to use as input with the VDATA command. Set CMODE ON
before using this command. See also the calibration procedures in
Section 4.