FIELD: transport.
SUBSTANCE: at least one pulse counter is used to determine actual travel (Xa) and actual speed (Va). Actual travel (Xa) is used to determine first boundary speed (V1) and second boundary speed (V2) to be compared with actual speed (Va). Note here that second boundary speed (V2) is read from boundary value data table (46) representing a stepped curve, while first boundary speed V1) is defined using computing operator built in automation system (4). First boundary speed (V1) and secondary boundary speed (V2) represent upper boundary speed values, respectively. Note also that if actual speed (Va) exceeds boundary speed (V1) and/or second boundary speed (V2), automation system initiates a correcting action.
EFFECT: no need in additional position detectors, higher reliability.
9 cl, 2 dwg
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