Detailed Description
2.2 Axis monitoring, protection zones (A3)
Basic logic functions: NC/PLC interface signals (Z1)
68 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
DB31, ...
DBX12.2 - DBX12.3
2nd software limit switch plus or minus
Edge evaluation: no Signal(s) updated: cyclic
Signal state 1 or
edge change
0 → 1
2nd software limit switch for the plus and minus directions is effective.
1st software limit switch for the plus and minus directions is not effective.
In addition to the 1st software limit switches (plus and minus), the 2nd software limit switches (plus
and minus) can be activated using these interface signals.
The position is defined using machine data:
MD36130 $MA_POS_LIMIT_PLUS2 (2nd software limit switch plus)
and
MD36120 $MA_POS_LIMIT_MINUS2 (2nd software limit switch minus)
.
Signal state 0 or
edge change
1 → 0
1st 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)
2.2.4 Signals from axis/spindle (DB31, ...)
DB31, ...
DBX60.2 - DBX60.3
Encoder limit frequency exceeded 1
Encoder limit frequency exceeded 2
Edge evaluation: no Signal(s) updated: cyclic
Signal state 1 or
edge change
0 → 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 continue to run with closed-loop speed control. Axes are stopped with a fast stop (with
open-circuit position control loop) along a speed setpoint ramp.
Signal state 0 or
edge change
1 → 0
The limit frequency set in machine data:
MD36300 $MA_ENC_FREQ_LIMIT
is no longer exceeded
(encoder frequency < ENC_FREQ_LIMIT_LOW).
For the edge change 1 → 0, the encoder frequency must have fallen below the value of machine
data:
MD36302 $MA_ENC_FREQ_LIMIT_LOW
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