Scale parameters and functions
8.24 DR 25 Dosing device parameters
SIWAREX WP251
126 Manual, 12/2015, A5E37203357A
Depth average filter 2 is used to damp the weight value against periodic disturbances. The
weight value is calculated from the average of the n (n = max. 250) most recent weight
values calculated by the weighing module every 10 ms. When n = 10, for example, 10 values
are used to calculate the average. Every 10 ms, the oldest value is omitted from the
calculation and the newest value is included in the calculation (running average).
Adopt corrected fine/trailing value to DR 23 automatically
At the initial start of a dosing with "Material A", WP251 calculates the shut-off points for the
coarse/fine signal according to settings from DR 23 (fine/trailing weight).
If the P-controller is active, the fine/trailing weight of "Material A" internally (DR 31) is
corrected or optimized by the controller during operation if necessary.
If there is now a change to "Material B" that entails different parameters, the corrected
fine/trailing weight of "Material" would have to be read from DR 31 and copied to DR 23
before the change so that at the next loading of "Material A" the optimized values are used
directly at the start.
To automate this copying, the "Adopt corrected fine/trailing value to DR 23 automatically"
parameter can be set to "YES" or "1".
DR 25 Dosing device parameters
8.24.1
This data record provides parameters that relate to the scale (dosing system) and are
independent of the material.
Table 8- 24 Assignment of data record 25
Contains no. of the data record
Length
Data record length information
USHORT
2
r
92
-
-
1723
Application
Information on application to
USHORT
2
r
105
-
-
1724
Version identifier
Current data record version
USHORT
2
r
1
1
65535
1725
Maximum single set
Specification in weight unit FLOAT 4 rw 100 0 0 1726
"Coarse" set value
for analogue output
% value referenced to 0/4-20
mA
FLOAT 4 rw 80 > Fine
signal
100 1728
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