Caen ELS LiAM 6005 User Manual page 41

LiAM User's Manual
- Over-Temperature – bit 3: this bit is set when an internal over-temperature
condition has been experienced. The setting of this bit implies the simultaneous
setting of the fault bit;
- Crowbar – bit 4: this bit is set when the voltage at the output terminals of the
module triggers the crowbar protection (see "Internal Protections" section for further
details). The setting of this bit implies the simultaneous setting of the fault bit;
- Interlock #1 – bit 5: this bit is set when the corresponding enabled external
interlock trip. This bit does not give any information about the activation state of the
interlock signal #1. The setting of this bit implies the simultaneous setting of the fault
bit;
- Interlock #2 – bit 6: this bit is set when the corresponding enabled external
interlock trip. This bit does not give any information about the activation state of the
interlock signal #2. The setting of this bit implies the simultaneous setting of the fault
bit;
- Regulation Fault – bit 7: this bit is set when a regulation fault is experienced.
The setting of this bit implies the simultaneous setting of the fault bit;
- Rail Undervoltage – bit 8: this bit is set when an under-voltage condition of
one of the voltage rails – i.e. voltage drops below a user-defined threshold – has been
recognized. As in other cases, the setting of this bit implies the simultaneous setting of
the fault bit;
- Load Fault Status – bit 9: this bit is set when a load fault condition appears:
this can be caused by an earth leakage current or an unknown change in the load
resistance. As in other cases, the setting of this bit implies the simultaneous setting of
the fault bit;
- Over-Voltage – bit 10: this bit is set when an over voltage condition has been
experienced on the output terminals of the LiAM unit (on thus on the load if correctly
connected). The setting of this bit implies the simultaneous setting of the fault bit;
- Rail Status [0...1] – bit 12...13: the LiAM power supply unit has an
"adaptive" behaviour of the voltage rails used to supply the output stage. Voltage rails
can be switched among three different levels – i.e. off, mid-voltage, max-voltage –
increasing the overall efficiency and making it similar to a "Class-G" amplifier. If
these bits are set to 00 the rails are off, if set to 01 are at mid-voltage and if set to 10
are at max-voltage level.
- Ramp Execution Flag – bit 14: this bit is set when the LiAM unit is
performing a ramp to a new set-point. After the ramp is finished, and the new set-
point is reached, this flag is cleared;
- Turning Off – bit 15: this bit is set while the LiAM module is turning off.
The power supply, in order to avoid undesired over-voltage due to the connected
inductive load, turns the output off by following a smooth behaviour – i.e. ramps
down to zero-current level with a pre-defined slew rate of 5A/s;
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LiAM Description