Danfoss VLT Series Programming Manual page 95

Servo Access Box (SAB) Oper...
NOTICE
If a short circuit of the IGBT switch occurs, the brake
resistor is powered continuously and the external mains
input must be cut by external means.
3.3.4 Input Voltages
The SAB monitors the phase balance of the input voltages.
If the imbalance becomes too high, a phase loss warning is
issued. If the situation remains, an error is issued and the
SAB enters the Fault state.
3.3.5 Temperatures
The SAB can operate within a temperature range of 5–
50 °C. If the temperature rises above the upper limit, the
lifetime of the electronics decreases at a forced pace and
there is a risk of malfunction. Therefore, the SAB has 3
temperature sensors that are placed on the power card,
the control card, and the SAB card. The measured temper-
atures are visual in the LCP and can be read via the
following fieldbus objects:
•
0x2000, sub-index 1 = Power card
•
0x2000, sub-index 2 = Control card
•
0x2000, sub-index 3 = SAB card
If 1 of the temperatures becomes too high, the SAB issues
a warning. If the temperature continues to rise and passes
a 2 nd limit, the SAB protects itself by shutting down and
issuing an error.
3.3.6 Cooling Fans
The SAB has 2 cooling fans to control the internal
temperature; 1 is on the power card and the other 1 on
the SAB card. The SAB controls the speed of the cooling
fans to maintain a sufficiently low temperature. The speed
of the power card fan can be read back via object 0x2009
(see chapter 8.7 Object 0x2009: Fan Speed Power Card).
3.4 External Encoder and Guide Value
It is possible to connect an external BiSS or SSI Encoder to
provide a system global guide value. Alternatively, it is
possible to generate a synthetic guide value. Operation is
identical to the servo drive. See objects 0x2062
(chapter 7.9 Guide Value Reference Objects), 0x2063
(chapter 8.18 Object 0x2063: Guide Value Reference Option
Code), and 0x3000 (chapter 7.21.6.1 Parameters 51-30 and
51-34 to 51-40: External Encoder Configuration (0x3000)).
3.5 Signal Tracing
For information on signal tracing, see chapter 2.7.2 Trace.
MG36D102
Programming Guide
3.6 Multiple Device ID Assignment
For information on multiple device ID assignment, see
chapter 6.1.2.2 Multiple Device ID Assignment.
3.7 Software Version
For information about the software, see
chapter 7.22.4 Parameters 15-40, 15-41, and 15-43: Version
log (0x4000).
3.8 Firmware Update
The SAB firmware can be updated remotely via the
fieldbus. The procedure for the SAB is identical to that of
the servo drive (see chapter 2.2 Firmware Update).
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