Xantrex Technology XG 850 Alarm Masking, 5Alarm Mask Bit Positions, Alarm Bit Position Value

Alarms and Errors

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 3–18. Setting the bit position (1) of an alarm will result in the alarm being enabled. Clearing the bit position (0) of an alarm will result in the alarm being masked/disabled.

For Example:
If you wanted to enable the OTP, Foldback and UVP alarms you
would take the OTP value of 2 and add it to the foldback value of 256
and the UVP value of 1024 to get a mask of 1282. This is the value
you would send with the SCPI command.	3
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.

Table 3-5Alarm Mask Bit Positions

Alarm	Bit Position	Value
Over Temperature Protection (OTP)	1	2
Fan	3	8
Foldback	8	256
External Shutdown	9	512
Under Voltage Protection (UVP)	10	1024

The SCPI command (s) for these instructions are: [:]SYSTem[<channel>]:PROTection:MASK

M370078-01 3-21