Set Value Generators
Parameter manual b maXX BM3000
Document no.: 5.12001.07 Baumüller Nürnberg GmbH
404
of 820
4.6
Z131.18– Fieldbus cycle time = 2 ms and Z131.20– Division ratio fieldbus
task = 1
Z145.11– Virt. master set value cycle time = Interpolation interval = 2 ms
2 ms / 1 ms - 1 = 1
Interpolator generates 1 interpolated set value in the ramp function generator.
Example 3: Fieldbus cycle = set value cycle = 1 ms and ramp function generator cycle = 250 µs
A new calculated set value is transferred in each fieldbus cycle.
The ramp function generator is configured in the fieldbus task. It has a cycle
time of 250 µs.
Z131.18– Fieldbus cycle time = 1 ms and Z131.20– Division ratio fieldbus
task = 4
Z145.11– Virt. master set value cycle time = Interpolation interval = 1 ms
1 ms / 250 µs - 1 = 3
Interpolator generates 3 interpolated set value in the ramp function generator.
Always the sum of main and additional set value will be interpolated, i.e. the value of
Z110.17– Input 32 bit additive is also effective at interpolation. Every change of the total
set value is immediately effective and interrupts a running interpolation if necessary.
The interpolator is implemented before the ramp function generator controller and the
ramp generator. Thus the functions of the ramp function generator remain also at active
interpolator, as e.
g. limitation and polarity reversal of the input value, directional block,
ramp function generator block, ramp function generator stop, quick stop function and
ramp generator.
This interpolator must not be confused with the interpolator of the ramp function generator
cycle to controller cycle. This interpolator is specified in chapter
ZSet Value Manager–
from page 394.
Interpolator active and ramp generator switched off
The ramp generator can be switched off either via Z110.2– Mode bit 10 (transparency
mode) or via setting ramp times to zero (Z110.6– and Z110.7–). The ramp function gen-
erator operates in both cases in the "transparency mode" (output = input), i. e. the cyclical
input set values are immediately effective at ramp output.
m Switch off via ramp times (= 0 s)
This means a stop at current limit, because the ramp-down time can be used also for
quick stop or error response ("stop at deceleration ramp"). If this is not desired, the stop
at deceleration ramp and the quick stop time in
Z110.8– must be set or the transpar-
ency mode via bit 10 must be used.
m Switch off via Mode bit 10 of parameter Z110.2–
The ramp-up and ramp-down times can be set here as required. In case of a stop at
the deceleration ramp, it will be broken at the deceleration ramp.
The bits 8 (Ramp-up is active) and bit 9 (Ramp-down is active) in Z110.1– are not
changed.
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