Signals From Axis/Spindle (Db31 - Siemens SINUMERIK 840D sl Function Manual
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Detailed Description
2.2 Axis monitoring, protection zones (A3)
DB31, ...
DBX12.2 - DBX12.3
2nd software limit switch plus or minus
Edge evaluation: no
Signal state 1 or
2nd software limit switch for the plus and minus directions is effective.
edge change
1st software limit switch for the plus and minus directions is not effective.
0 → 1
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
1st software limit switch for the plus and minus directions is effective.
edge change
2nd software limit switch for the plus and minus directions is not effective.
1 → 0
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 state 1 or
The limit frequency set in the machine data:
edge change
MD36300 $MA_ENC_FREQ_LIMIT (encoder limit frequency)
0 → 1
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
The limit frequency set in machine data:
edge change
MD36300 $MA_ENC_FREQ_LIMIT
1 → 0
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
68
Signal(s) updated: cyclic
Signal(s) updated: cyclic
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
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