Stopping/Aborting A Test; Clearing Protection Events And Errors - Keysight Technologies BT2152B Operating And Service Manual

4 Programming Reference

Stopping/aborting a test

Because the INITiate:TEST commands could take hours to execute, it may be necessary to stop the
test in the middle to debug or fix a problem like a damaged fixture or cell installed backwards.
If the host computer is located in another building in a distributed factory environment, stopping the
program may not be practical.
The front panel Stop button can be used to immediately stop a test. This will safely stop the test
without losing test data or test configuration. Note that the ABORt command performs the same
function as the front panel Stop button.

Clearing protection events and errors

When the Error light is red, either a protection event or an error has occurred and need to be cleared.
Protection events occur due to an over-voltage (OV), under-voltage (UV), or over current (OC)
condition. The unit will latch off and cannot be operated until the fault is cleared. To clear the fault the
cause of the fault must first be removed and then the protect status then needs to be cleared. These
faults are part of the Alarm Status Group.
To query if a protection event has occurred, send:
STATus:ALARm:EVENt?
The value returned indicates the type of protection event: Over-voltage = 1; Over-current = 2; Under-
voltage = 512. The command reads and clears the fault when it is sent to the instrument. To determine
if the protection condition still exists, send:
STATus:ALARm:CONDition:CURRent?
STATus:ALARm:CONDition:VOLTage?
STATus:ALARm:CONDition:VOLTage:UNDer?
If a value other than zero is returned when these commands are sent, the condition is still present and
must be removed. if the condition is no longer present, send the following command to clear
protection status. This will turn the front panel Error light off.
OUTPut:PROTection:CLEar
Errors occur due to a variety of command processing errors, such as failing to read back the result from
a query command. The instrument will continue to operate with errors present. Note that the front
panel Error light does not turn on from command precessing errors.
To read and clear error codes send:
SYSTem:ERRor?
Each time this command is sent, one error is removed from the error queue. When the query returns a
zero, all error have been removed from the queue.
58 Keysight BT2152A/B Operating and Service Guide