Kollmorgen TTB-2950-3010-J Redundant channel module

In Automatic Start mode, the turbine may be re-started, even though the turbine is still rolling. If a re-start is needed, the only requirement is that the Run contact is closed, the Reset contact is toggled off to on and the Start contact is toggled off to on. When the Start contact is set to the Start position, the speed reference will immediately jump to the actual speed of the turbine. 

The governor valve will start opening. 

The speed of the turbine will start increasing back to Rated Speed. The speed reference will not jump higher then the Rated Speed value. If the Start contact is not toggled, and the Reset contact is the only input that is toggled, the turbine will go through a normal start sequence with the speed reference slowly ramping up, and the governor valve opening on the valve limiter.

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