The weight of every item of freight is captured on either platform or roller conveyor scales. These values are used as the basis for the load planner’s most important working document – the load and trim sheet where the load and optimum distribution of masses (trim) are precisely determined. In Zurich, weighing is carried out on over 150 scales. To future-proof the system, the logistics company is focusing on even more diagnostic options and monitoring as part of a modernization program. This includes Siemens technology in the form of the Siwarex DB digital junction box with Siwarex WP231 weighing electronics which allow all the individual load cells to be monitored.
Precision individual monitoring for greater efficiency
Siwarex WP231 is a stand-alone electronic weighing system that can also operate without an additional Simatic PLC and that fits seamlessly into the process at Cargologic. The roller conveyor scales are operated via a Simatic IPC277 panel PC with Windows operating system. The operating logic and design are based on the previous weighing system. “But for us, the highlight of this modernization lies elsewhere. With the Siwarex DB digital junction box, we can not only continue to use our previous analogue load cells, but we now monitor all four cells of the roller conveyor scales individually,” says Urs Strupler, who is responsible for purchasing and maintenance at Cargologic. This single channel monitoring means that a cell failure is instantly displayed on the control panel. “We can react immediately and thus reduce the downtime of the scales to a minimum,” enthuses Strupler. This increases the accuracy and availability of the entire weighing process which in turn reduces costs, probability of errors, and the time required in the process.