User guide

35
Remote Interface Reference
SCPI Status System
4.2.4 Alarm Registers
The Alarm register group reports the present condition of all alarms in the
Alarm Condition
register, and
latches the ON state
of all alarms in the
Alarm Event
register.
Any or all of the bits in the Alarm Event register can be reported to the
Status Byte register by enabling the corresponding bit(s) in the Alarm
Event enable register (see Figure 4-1). To set the Alarm Event enable
register, write a binary-weighted decimal value using the
STATus:ALARm:ENABle <
value
>
command.
The bit definitions for the Alarm Condition and Event registers are
identical and are provided in Table 4-3. The Alarm Condition register is
continually updated for each level measurement is available. The Alarm
Event register latches the occurrences of each alarm and the respective
bit(s) remain set until cleared.
The Alarm Event
register
is cleared when:
The
*CLS
(clear status) command is executed.
Table 4-2. Bit definitions for the Standard Event register.
Bit Number
Decimal
Value Definition
0
Operation Complete
1
All commands prior to and including
*OPC
have been executed.
1
Not Used 2 Always “0”.
2
Query Error
4
A query error occurred. See the
error messages in the -200 range.
3
Device Error
8
A device error occurred. See the
error messages in the -400 range.
4
Execution Error
16
An execution error occurred. See the
error messages in the -300 range.
5
Command Error
32
A command error occurred. See the
error messages in the -100 range.
6
Not Used 64 Always “0”.
7
Power On
128
Power has been cycled since the
last time the Standard Event register
was read or cleared.