1. Programmable Power Up States in a Rolling Mill Application
In a rolling mill, heated steel is forced through rolling machinery to create steel beams of varying widths. The rolling motor is controlled by a digital output line from a digital I/O module. When the computer is powered on, the rolling motors must be turned off to prevent any steel from being wasted during startup. If the digital I/O module does not provide a way to guarantee the initial outputs, the computer must completely boot and a control program must be started before known states are output on the channels. This lack of control could result in the waste of expensive raw materials and equipment damage.
Programmable free power-up states ensure that all digital outputs will begin in a known state any time the device is powered on. Since none of the machinery turns on unexpectedly, no steel is wasted.