The mill had upgraded the profile controller on the #1 Paper Machine to a control system that used Ethernet and TCP/IP to communicate between the scanners and the main controller. It was also connected to the main mill network through a bridge so that profile information could be accessed by business applications. Some time after the installation, a network printer in another area of the mill was accidentally given the same IP address as the controller. Initially this did not cause difficulties, but shortly after a routine maintenance shutdown, the scanners started directing their data to the printer rather than to the controller.

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