Profibus

PROFIBUS-DP (Decentralized Periphery) is supported by a high-speed interface card using the Siemens SPC3 chip set. The PROFIBUS Interface Option is an intelligent device (Passive Station) to a scanning PROFIBUS compatible Controller Device (Active Station) such as a Programmable Logic Controller (PLC) or Personal Computer (PC). Users can access data exchanged between the Controller Device and the Hardy Weight Controller, for use in PLC ladder logic, chart, or other programs.

The PROFIBUS Interface Option enables the PROFIBUS Controller to use all configuration, weighing, diagnostics, and scale calibration functions contained in Hardy controllers.

The PROFIBUS Interface Option is designed to allow the user to select commands and summaries via two data transfer options: (Selectable Transfers) or (Block Transfers) a set of pre-defined data blocks. The Write commands (outputs) are used to send commands from the Primary Controller to the weight controller. The Read Data Summaries (inputs) are used to return weight and scale status data to the Primary Controller. Because the PROFIBUS Interface Option data is already in integer values, time-wasting conversion steps are eliminated. This reduces the time it takes to incorporate the PROFIBUS Interface Option into the Controller’s ladder logic or chart code.

The PROFIBUS Interface Option uses transmission medium (2 or 4 wire cable) characteristic of serial fieldbus applications.

A PROFIBUS Interface Option enables bi-directional communications between a Primary Controller and Secondary Device for weight, set point, status, and calibration data. The PROFIBUS Interface Option is used for the following applications:

• Filling
• Dispensing
• Batch Weighing Control
• Monitoring Rate of Flow
• Evaluating Totalized Weight
• Check Weighing
• Weight Level Alarming