Configuration
Function blocks
Diameter calculator (DCALC)
8
8.2
8.2.1
8.2-4
EDSVF9333V EN 3.0-06/2005
In configurations with speed precontrol it is common to multiply the
precontrol signal with the reciprocal value of the diameter (d). This value is
output at DCALC1-OUT.
ƒ C1308 = 0: DCALC1-OUT = d
ƒ C1308 = 1: DCALC1-OUT = 1/d
For the conversion into 1/d the reference value for the diameter at which the
signal at DCALC1-OUT is to amount to 100 % must be defined in C1309.
ƒ In general, C1309 corresponds to the minimum diameter in C1305
(d
min
).
To guarantee a constant transition when setting new diameter values, a
newramp-functiongeneratorisactivatedifC1310>0s.
A window comparator compares the calculated value with the value which
was filtered last.
ƒ In C1311 the maximum difference in [%] between both values is
defined.
ƒ DCALC1-I=0 is set to LOW when the maximum difference will be
exceeded.
Converting the diameter (d) in
1/d
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