Protection of the Weighing Parameter Settings

Introduction

Any weighing instrument that can be used for commercial transactions requires approval. The parameters associated with the measurement require protection. It should not be possible to introduce into an instrument, via the interface, instructions or data likely to:

falsify the weighing results displayed
change an adjustment factor

NOTE: Protection by sealing helps provide measurement conformity so that the parameters accessible only apply to the exploitation aspects of the module information by the mechanism.

Effect of Protecting the Configuration Parameters

There are two types of information:

information that can be protected

(If a module is sealed, this type of information will be available in read only.)
information with free access (read and write)

The following table identifies the characteristics of this information according to the protection put in place.

Functions	Without Sealing	With Sealing
Task	Modifiable	Modifiable
Flow/ Calculation on n measurements	Modifiable	Modifiable
Tare/ Predefined	Modifiable	Modifiable
Threshold checking/ Active	Modifiable	Modifiable
Threshold checking/ Direction	Modifiable	Modifiable
Threshold checking/ Active outputs	Modifiable	Modifiable
Threshold Checking/ Cut-off points	Modifiable	Modifiable
Threshold checking/ LV Mask Time	Modifiable	Modifiable
Unit	Modifiable	Non modifiable
Max Range (MR)	Modifiable	Non modifiable
Scale Division	Modifiable	Non modifiable
Overload Threshold	Modifiable	Non modifiable
Filtering/ Coefficient	Modifiable	Modifiable
Data format	Modifiable	Non modifiable
Stability/Extent of Range	Modifiable	Non modifiable
Stability/Time	Modifiable	Non modifiable
Zero/Zero tracking	Modifiable	Non modifiable
Zero/Recalibration range	Modifiable	Non modifiable

The information word %Iwr.m.0.4.4 (to 1) tells you if the measurement is protected.

Consequences of Protection

A sealed module that receives a different configuration from the one memorized (before being switched off prior to the movement of the jumper) is refused.
In this case the module is seen as missing in the PLC diagnostics, but sends a weight to the display.
A sealed module will not accept a new calibration request.

NOTE: Using the file allows you to keep a paper record of the configuration.