Parameter Relation; Fine Weight; Trailing Weight - Siemens SIWAREX WP251 Manual

8.22.2

Parameter relation

The parameter defines how the specifications for the fine weight and trailing weight are to be
interpreted. The following options are available for selection:
Function
code
0 (default)
1
8.22.3

Fine weight

This parameter defines how much material is to be dosed with fine signal only. Depending
on the selected unit reference (DR 23), the value must be interpreted as a percentage of the
set point (DR 20) or as an absolute weight value.
Example:
Set point (DR 20) = 100 kg
Function code for parameter relation (DR 23) = 0
Fine value (DR 23) = 20
→ As a result of this setting, 20 kg (20% of 100 kg) is dosed with fine flow only.
8.22.4

Trailing weight

The parameter defines how much material still flows onto the scale after the fine signal is
shut off. Depending on the selected unit reference (DR 23), the value must be interpreted as
a percentage of the set point (DR 20) or as an absolute weight value.
Example
Set point (DR 20) = 100 kg
Function code for parameter relation (DR 23) = 0
Fine weight (DR 23) = 5
Trailing weight (DR 23) = 2
→ With this setting it is assumed during dosing that 2 kg (2% of 100 kg) still flows onto the
scale after the fine signal is shut off.
In the example, this means specifically that the coarse and final signal are switched at the
start of the dosing. When 93 kg is reached, the coarse signal is shut off. When 98 kg is
reached, the fine signal is shut off. The following graphic explains the relationship.
SIWAREX WP251
Manual, 12/2015, A5E37203357A
Meaning
Fine and trailing weights are interpreted as specified percentages of the set point (DS
20).
Fine and trailing weights are interpreted as absolute weights in the weight unit.
Scale parameters and functions
8.22 DR 23 Material parameters
119