Process control system with a charging function

摘要

The invention relates to a process control system comprising a calculating unit enabling a charge value (W) to be determined from operations occurring in the process control system. Preferably, said process control system comprises a process control computer with a web server and a computer which is used to access the processes control computer via Internet. The charging value (W) is especially a service fee which is to be paid to an application service provider by a user of the process control system.