Siemens SINUMERIK 804D sl Commissioning Manual page 143

• MD36120 POS_LIMIT_MINUS2 (2nd software limit switch minus)
• MD36130 POS_LIMIT_PLUS2 (2nd software limit switch plus)
• IS: DB31,... DBX12.2 (2nd software limit switch minus)
• IS: DB31,... DBX12.3 (2nd software limit switch plus)
• Alarm: "10620 Axis reaching software limit switch +/-"
• Alarm: "10621 Axis is at software limit switch +/- (JOG)"
• Alarm: "10720 Progr. end point is behind software limit switch +/-"
Hardware limit switches
If the PLC signals that a hardware limit switch has been reached, the machine axis is
stopped with the parameterized brake response.
• IS: DB31, ... DBX12.1 (Hardware limit switch plus)
• IS: DB31, ... DBX12.0 (Hardware limit switch minus)
• MD36600 BRAKE_MODE_CHOICE (deceleration behavior on hardware limit switch)
• Alarm: "21614 Hardware limit switch [+/-]"
Figure 10-15 Overview of end limitations
Dynamic monitoring functions
The dynamic monitoring functions with reference to a machine axis are:
CNC Part 1 (NCK, PLC, drive)
Commissioning Manual, 11/2006, 6FC5397-2AP10-2BA0
Notice
All position monitoring functions are only active with valid reference point of the
corresponding reference point of the machine axis.
0 = Brake characteristic is complied with
1 = Rapid deceleration with setpoint "0"
NCK start-up
10.5 Parameterize axis data
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