Siemens SINUMERIK 840Di sl Commissioning Manual page 425

Working area limitation
The permissible working area of the machine axes can be adapted to the particular
machining situation using the "dynamic" working area limitation.
● SD43400 $SA_WORKAREA_PLUS_ENABLE (Working area limitation active in the
● SD43410 $SA_WORKAREA_MINUS_ENABLE (Working area limitation active in the
● SD43420 $SA_WORKAREA_LIMIT_PLUS (Working area limitation plus)
● SD43430 $SA_WORKAREA_LIMIT_MINUS (Working area limitation minus)
● Alarm "10630 Axis reaching operating range limit +/-"
● Alarm "10631 Axis is at operating range limit +/- (JOG)"
● Alarm "10730 Progr. end point is behind working area limitation +/-"
Software limit switches
Two software limit switch pairs are provided per machine axis. The active software limit
switch pair is selected in the PLC.
● MD36100 $MA_POS_LIMIT_MINUS (1st software limit switch minus)
● MD36110 $MA_POS_LIMIT_PLUS (1st software limit switch plus)
● MD36120 $MA_POS_LIMIT_MINUS2 (2nd software limit switch minus)
● MD36130 $MA_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 $MA_BRAKE_MODE_CHOICE (Braking behavior on hardware limit switch)
● Alarm "21614 Hardware limit switch [+/-]"
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
positive direction)
negative direction)
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"
NC Commissioning with HMI Advanced
11.5 Axes and spindles
425