Polling system for a moved machine component

A polling system for a moved machine component, the system comprising:

• a polling subunit disposed at the machine component and having at least one switch that operates without power in a certain state of the machine component or a certain position of a part of the machine component, a radio transmitter unit that evaluates switching modes of said switch and transmits evaluated switching signals using digital radio switching signals, and an electric power source for supplying the radio transmitter unit;
• and
• a radio receiver unit that is stationary relative to said polling subunit, said radio receiver unit receiving and evaluating, forwarding and/or displaying signals received from said radio transmitter unit, wherein said radio transmitter unit is structured to only transmit radio switching signals upon a change in a switching mode of said switch, said radio contact control signals being transmitted at regular time intervals, wherein said radio receiver unit evaluates, passes on, and/or displays said signals to permit prompt recognition of polling system failure.

The polling system of claim 1, wherein said radio transmitter unit is structured to monitor a status of said power source and to transmit relevant power source check signals, wherein said radio receiver unit evaluates, forwards and/or displays those signals.