examples:
- '1: In a vending machine the program is started by inserting a coin. The program
can respond in two ways: either accept the coin and release the article or return
the coin with the article output remaining blocked. The decision is made based
on the result of the check of the inserted coin and the article stock.'
- '2: A machine tool which automatically executes operations under program control
is an automaton. Examples: automatic lathe, milling machine.'
- '3: In a temperature controller a reference variable is set, which will be compared
with the feedback variable. Based on the result of the comparison the controller
drives the final controlling equipment. In other words, based on the difference
between the reference variable and the feedback variable (representing the temperature
as controlled variable) the controller and the final controlling equipment influence
the temperature via the manipulated variable (output variable).'
351-49-07:
examples:
- ": A practical example of an actuator acting directly on the final controlling
element is a DC drive. The control unit takes the function of an actuator. The
final controlling element is formed by the thyristor assembly that delivers a
variable DC voltage as an output variable. The control unit and the thyristor
assembly together form the final controlling equipment."
351-49-10:
examples:
- '1: Electronic ramp-function generator the output signal of which follows variations
of the input signal only up to a maximum permissible rate of change. If the rate
of change of the input signal exceeds the permissible limit, the output signal
follows only at a preset maximum rate of change.'
- '2: A turbine wall temperature measuring device ensures that the turbine output
power is varied at such a rate that the temperature difference between the various
zones of the turbine wall does not exceed permissible values.'
351-42-32:
351-49-07:
351-49-10: