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Local Operation
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The alarm LED will remain illuminated until the alarm is manually
cleared (see
“Clearing Triggered and Manual Alarms” on page 3–18) or
by turning the main output on if the alarm has automatically been cleared.
Alarm Masking
It is possible to completely disable some alarms through the use of the
alarm mask. If an alarm is masked then this masking will prevent it from
registering in the SCPI conditions registers as well as not triggering the
alarm. The alarms that can be masked are identified in
Table 3-4 on
page 3–17.
Control of the alarm mask is only available using the SCPI command.
The SCPI command (s) for these instructions are:
[:]SYSTem[<channel>]:PROTection:MASK
The mask command takes a single parameter made up of the sum of the
values for the alarms that are to be masked. See
Table 3-5 for the alarm
values associated with each maskable alarm.
The SCPI command (s) for these instructions are:
[:]SYSTem[<channel>]:PROTection:MASK
Table 3-5
Alarm Mask Bit Positions
Alarm Bit Position Value
Over Temperature Protection (OTP) 2 2
Over Temperature Protection (OTP) Slave
(1700W version only)
3 4
Fan 4 8
Fan Slave
(1700W version only)
5 16
Foldback 8 128
External Shutdown 9 256