Im trying to link Weight bridge system with an ERP system,
and I read from documents that PLC provides a Real Time time Connections between ERP system and the weight brridge Scale.
I assume you mean a weigh-bridge for measuring the weight of lorries. If so, many of the weigh-bridge manufacturers have software packages based around a database that could be linked with ERP. In my opinion, this would be easier, and more efficient, than trying to link the two via a PLC. Also, in some countries, weigh-bridge software must be approved by an inspector from whichever organisation regulates weights & measures. Try doing a web-search on weigh-bridge software and you should get quite a few hits.