1100 HEIDENHAIN Technical Manual iTNC 530 HSCI
Additional settings Since the residual energy of the DC-link is only available for a controlled
LIFTOFF for a very short time, under certain circumstances the prescribed
distance may not be reached. Since even times on the scale of milliseconds
can be of use here, a special possibility was created in order to react to a
power failure more quickly. The starting point is the processing time for the
HSC nominal position value filters, which, due to the number of filter
coefficients (filter order) to be calculated, lead to a delay in the reaction time.
This number of filter coefficients to be calculated can be reduced with
MP1262 (filter order for HSC filters) and MP1263 (filter order for advanced
HSC filters). The starting point is the filter order of 31 recommended by
HEIDENHAIN, which is entered as a default value and should suffice for the
LIFTOFF function in most cases.
If this is not the case, then you can reduce the reaction time via the filter order.
Since the coefficients are calculated in the interpolator clock cycle of usually
3.0 ms, the reaction time decreases correspondingly per decrement of the
filter order.
Starting from the following settings for MP1262 and MP1263, checking and
re-adjustment of the nominal position value filters is strongly recommended:
MP1262 ≤ 1.1 / (MP1212*interpolator cycle time)
MP1263 ≤ 0.67 / (MP1213*interpolator cycle time)
MP1262 Filter order used for HSC filters
Input: 0 to 31 [filter order]
Default: 31
MP1263 Filter order used for advanced HSC filters
Input: 0 to 31 [filter order]
Default: 31
The CC 424(B) controller board was used to define voltage thresholds in
MP2192 and MP2194, which were used to configure the LIFTOFF function.
These voltage thresholds are now defined by the HSCI CC 61xx controller unit
itself, depending on the power supply module being used. The associated
machine parameters MP2192 and MP2194 are no longer required. If you do
not need the LIFTOFF function, you can use bit 9 in MP2195 to deactivate
monitoring of the DC-link voltage.
The CC 61xx makes the following distinction: It takes into account whether
the power supply module is:
a regenerative power supply module with servo-controlled DC-link voltage, or
a nonregenerative power supply module where, due to changes in the line
voltage and load on the DC link, voltage fluctuations must be considered.
MP2195 Monitoring of the DC-link voltage
Input: Bit 9
0 = Uz monitoring and LIFTOFF function are active
1 = Uz monitoring and LIFTOFF function are not active
A modification of the filter order means a basic change in the filter
characteristics of the nominal position value filters set, and can therefore
have significant influences on the behavior of the machine. The effects
must be checked individually, and the nominal position value filters must be
re-adjusted if necessary.
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