Filter
Top Products
Operating Instructions
63
SRQ?
and addressing the power supply to talk. The response from the power supply is in this format:
SRQ 0 or SRQ 1
in which 0 indicates that service request capability is disabled, and 1 indicates it is enabled.
Note that service request capability for power on is controlled by the rear-panel PON SRQ switch, the setting of which will
not be indicated in response to an SRQ? query.
Clear. The power supply can be returned to its power-on state with the command:
CLR
or by sending a device clear interface command. Clear is typically used to initialize the power supply to a known state at the
beginning of a program. Clear also resets the PON bit in the serial poll register.
The clear command does not complete until the power supply control circuits have had time to settle. This prevents
perturbations on the power supply output, regardless of the state before the clear command was sent. The clear command
takes about 500 ms to execute.
Note that stored preset states (as many as 16) are not changed by the clear command.
Error. When the power supply detects a remote programming error it sets the ERR bit in the status register, which can be
unmasked to request service, and it turns on the front-panel ERROR indicator. The ERR bit is also available in the serial
poll response. Programming errors are usually the result of misspelled words or forgotten separators. When the power
supply detects a programming error it dumps whatever portion of the command it has received and ignores all further
characters until a terminator is received.
The type of error detected can be determined by sending:
ERR?
and addressing the power supply to talk. The response from the power supply is in this format:
ERR x
where x is a decimal digit from 0 to 8.
Table 3-10 lists the error codes with descriptions of each.
Test. The power supply runs a series of self tests when it is turned on, and selected tests can be run for troubleshooting.
Either of two subsets of the self tests can be run by command from the controller. Self tests can be invoked via the GP-IB by
sending the command:
TEST?
The type of self tests performed depends on whether the power supply output is turned on or off.