Subtractive / Additive Tare Device; Weight Simulation Allowed; Automatic Zero Tracking - Siemens SIWAREX WP251 Manual

The automatic adjustment sets the scale to zero without a further command in the event of
slow zero drifting. Slow drift is assumed if the OIML R76 criteria for this are met.
Note
If the scales are not being used in legal trade operation (no OIML restrictions) and this
function is enabled, the scales may eventually read zero after a slow drift even if they are
fully loaded. The function can, however, be limited by setting a maximum and minimum
weight for zeroing.
8.3.13

Subtractive / additive tare device

If necessary, the scale can be tared using the "Tare" command.
The display value is hidden when a subtractive tare is enabled if the gross value exceeds the
maximum weighing range by more than 9e.
When an additive tare is enabled, the display value is not hidden until the net weight
exceeds the maximum weighing range. In the case of subtractive tare, the maximum tare
weight is limited to 100% of the maximum weighing range. In the case of additive tare, the
maximum tare weight is limited to 250% of the maximum weighing range.
The current tare value is deleted if you switch between additive and subtractive taring.
Note
There is no automatic evaluation of whether there is sufficient load cell measuring range
capacity for an additive tare. The plant constructor is responsible for this evaluation.
8.3.14

Weight simulation allowed

For test purposes, weight simulation can be enabled instead of the actual weight
determination on the basis of the load cell signal. The simulated weight value is specified
using data record DR 16 and controlled with the "Weight Simulation on (3)" and "Weight
Simulation off (4)" commands. Weight simulation can, in certain situations, facilitate scale
testing and commissioning. The simulated weight is indicated on the main display with the
word "TEST".
8.3.15

Automatic zero tracking

The parameter defines whether the zero tracking (if activated) is to be active only outside the
automatic dosing cycle (only in weighing step 0) or also inside the dosing cycle.
SIWAREX WP251
Manual, 12/2015, A5E37203357A
Scale parameters and functions
8.3 DR 3 Calibration parameters
69