Weighing Module Operation

Introduction

In the PLC environment, the module uses, in the same way as other modules, a set of data which are specific to it.

This information is used for the exchanges (report and commands) with the processor.

Structural Diagram

The following operation diagram shows the processes executed by the module and the elements to be configured.

Description of Operation

The following table describes the various operating phases of the module.

Phase	Operation	Description
1	measurement processing	The signal from the weighing sensors is: converted, filtered according to the choice made in the configuration screen, scaled, the scaling characteristics are determined at the end of a calibration.
2	measurement checking	The measurement taken from the processing is subject to the following checks: a underload or overload check, a stability check defined by a stability range and a stability time, a check for presence in the zero zone.
3	data exchanges with the processor	The module receives and processes the commands from the processor (Set to zero, tare mode semi automatic, etc.). It also prepares the data in legal format for display on the TSX XBT N410. It returns various information to the processor such as the gross weight, the net weight, the flow, the tare and the statuses.
4	data display	The TSX XBT N410 displays the weight or the manual tare, in the unit chosen in the configuration and 4 items of additional information: the net weight, the stability, the presence in the zero zone and the unit of weight.
5	output management	The card can directly manage 2 discrete outputs and control them according to thresholds transmitted to the module by the application program. The elements used for this management are: the switchover thresholds, the direction of movement of the weight (Weighing or Downweighing), the switchover logic of the outputs.