Siemens SINUMERIK 840D sl Function Manual

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DB31, ...DBX12.2 - DBX12.3 2nd software limit switch plus or minusSignal state 0 oredge change1 → 01st software limit switch for the plus and minus directions is effective.2nd software limit switch for the plus and minus directions is not effective.Corresponding to ... MD36110 $MA_POS_LIMIT_PLUS (1st software limit switch plus)MD36130 $MA_POS_LIMIT_PLUS2 (2nd software limit switch plus)MD36100 $MA_POS_LIMIT_MINUS (1st software limit switch minus)MD36120 $MA_POS_LIMIT_MINUS2 (2nd software limit switch minus)19.2.4 Signals from axis/spindle (DB31, ...)DB31, ...DBX60.2 - DBX60.3 Encoder limit frequency exceeded 1Encoder limit frequency exceeded 2Edge evaluation: No Signal(s) updated: CyclicallySignal state 1 The limit frequency set in the machine data:MD36300 $MA_ENC_FREQ_LIMIT (encoder limit frequency)has been exceeded.The reference point for the position measuring system involved has been lost (IS: Referenced/synchronized has a signal state 0). Closed-loop position control is no longer possible. Spindles con‐tinue to run with closed-loop speed control. Axes are stopped with a fast stop (with open-circuitposition control loop) along a speed setpoint ramp.Signal state 0 The limit frequency set in machine data:MD36300 $MA_ENC_FREQ_LIMITis no longer exceeded.For the edge change 1 → 0, the encoder frequency must have fallen below the value of machine data:MD36302 $MA_ENC_FREQ_LIMIT_LOW (encoder limit frequency for encoder resynchronization)Z1: NC/PLC interface signals19.2 Axis monitoring, protection zones (A3)Basic FunctionsFunction Manual, 01/2015, 6FC5397-0BP40-5BA2 1591