Siemens SIWAREX WP251 User Manual

Scale parameters and functions
8.3 DR 3 Calibration parameters
SIWAREX WP251
Manual, 12/2015, A5E37203357A
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7. Scale is emptied, if necessary (based on setting in DR 25) (weighing step 5)
8. WP251 jumps to weighing step 0 and waits for further commands or jumps directly back
to step 1 (continuous operation).
8.2.6
Operating mode AWI (automatic catchweighing instrument) - Removal
In ACI mode, WP251 allows a set point to be set, which is then dosed automatically by the
dosing functionality of the module.
The dosing signals "Coarse flow/Fine flow" can be used to directly control the corresponding
dosing elements (e.g. valves). After the set point is reached, WP251 automatically logs the
dosed weight in the log memory and completes the weighing operation autonomously.
In contrast to NAWI mode, the logging of the dosed single weight is written automatically to
the log memory without an operator intervention.
"Removal" means that the product to be weighed is dosed from the scale (for example, a silo
on load cells with discharge valves). In this case, the full scale is tared and the net weight
increases with decreasing gross weight. The "Dosing start" parameter in DR 25 should be
set to "Tare" for correct operation.
Dosing in continuous operation is possible.
Here is the basic sequence of dosing in ACI - Removal mode:
1. Scale is filled with sufficient material.
2. PLC sends set point (DR 20) and material parameters (DR 23) to WP251
3. PLC sends "Start" command (e.g. 1101) to WP251
4. WP251 tares (based on setting in DR 25) (weighing step 1)
5. Coarse/fine dosing phase starts (weighing step 2)
6. If configured and necessary, post-dosing occurs (DR 22) (weighing step 3)
7. Dosing result is automatically checked and logged (weighing step 4)
8. Emptying signal is set, if necessary (based on setting in DR 25) (weighing step 5)
9. WP251 jumps to weighing step 0 and waits for further commands or jumps directly back
to step 1 (continuous operation).
8.3
DR 3 Calibration parameters
8.3.1
Overview
The calibration parameters (DR 3) must be checked and changed, if necessary, for each
scale.

Siemens SIWAREX WP251 Specifications

General

Brand	Siemens
Model	SIWAREX WP251
Category	Accessories
Language	English