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LiAM Description
3.3 Status Register
Each LiAM module has an internal 16-bit status register that contains all useful
information about the power supply operation; this register is updated in real-time and
it is always accessible by the users via the remote connection.
The internal status register structure is presented in
and bit 0 the LSB):
Status bit
15
14
13...12
11
10
9
8
7
6
5
4
3
2
1
0
Table 5: 16-bit (2-byte) internal status register
The status register value can be directly read by users using the 'MST\r'
command. The returned item is a 2-digit hexadecimal ASCII string, corresponding to
the equivalent status register. A brief description of all the binary flags is here
presented:
- Module ON – bit 0: this bit is set if the module is enabled and correctly
regulating output current;
- Fault – bit 1: this bit is set if the module has experienced a fault – e.g.
generated by an external interlock or an internal protection trip – and the status
register has not been reset;
- AC Fault – bit 2: this value is an AC fault condition is present (e.g. a phase
loss);
Table 5
Cell Caption
TURNING OFF
RAMP EXECUTION FLAG
RAIL STATUS [1...0]
reserved
OVER-VOLTAGE
LOAD FAULT STATUS
RAIL UNDERVOLTAGE
REGULATION FAULT
INTERLOCK #2
INTERLOCK #1
CROWBAR
OVER-TEMPERATURE
AC FAULT
FAULT
MODULE ON
LiAM User's Manual
(bit 15 is the MSB
40
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