AMETEK HPD Series - Manual (Page 47)

Operation
Command Reference
45
Command Description
SRQ <1/ON>,<0/OFF> SRQ ON enables the supply to respond to a variety of fault conditions with a
request for service to the IEEE-488 bus controller. With SRQ ON, the SRQ
line will be asserted true whenever the FAULT bit in the supply's serial poll
register changes from 0 to 1. Therefore, the mask register, in addition to
specifying which conditions set the FAULT bit, also determines which
conditions can generate service requests. Ten power supply conditions are
defined as faults: CB, CC, OV, OTP, SD, ERR, FOLD, ACF, OPF, SNSP.
Use the FAULT? query to discover which condition caused the service
request. See
“Accumulated Status, Status, and Fault Registers” on page
48 . A request for service at Power ON (PON SRQ) is set via a rear panel
switch on the supply. See “Power On Service Request (PON SRQ)” on
page 24 . SRQ remains disabled until the FAULT bit in the serial poll register
is cleared by a FAULT? query.
SRQ? Returns the supply's present ability to generate service requests.
Response: SRQ 0 (disabled)
SRQ 1 (enabled)
STS? Returns the supply’s present status register. Status conditions are stored in
the status register. Each bit represents a separate condition. When the
condition is true, the corresponding bit is 1 (true). Bits remain set in the
status register as long as the condition is true. See
“Accumulated Status,
Status, and Fault Registers” on page 48 .
Response: STS where status mask is the decimal equivalent
of the total bit weights for the operating conditions as listed in the status
register.
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 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 48 .
Mnemonics: CV, CC, OV, SD, FOLD, ERR, PON, ALL, NONE
Initial value: UNMASK NONE
UNMASK? Returns the supply's fault conditions which are currently enabled
(unmasked).
Response: UNMASK 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 48 .