American Magnetics 187 Self-Compensating Liquid Level Controller - Manual (Page 46)

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:
W 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.