Counters are devices that will receive a string of count pulses from a machine operation and perform an output function based on a number of counts predetermined by the user. Most counters, like timers, can have internal and delay operation. Interval operations means that a load will be actuated at the end of the counting cycle. Solid-state and electromechanical versions are avaible.
Counters are generally thought of as devices that tabulate or count “things” such as a bottles, cans, boxes, castings, and so on. In many industrial control sytems, it is necessary to counts something that affects a controlled process. When the count reaches a certain number, a control action is initiated.
In a mechanical counter, every time the actuating lever is moved over, the counter adds one number, and the actuating lever returns automatically to its original positions. Resetting to zero is done by a pushbutton located on the side of the unit. In an electronical counter, the count set point can be adjusted by the knob on the front of the unit. A progess pointer, indicating the count progession, advances clockwise, from setpoint to zero. A solid-state counter has high-speed pulse operation with 100% accurancy and has programmable features. Counter ouput action occurs when the count total indicated by the thumbwheel switches is reached.
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