Siemens SINUMERIK 840D sl Function Manual page 1645

DB31, ...
DBX83.1 Setpoint speed limited (programmed speed too high)
Application exam‐ In the PLC user program, it can be identified via the interface signal that the spindle setpoint speed
ple(s) has not been reached. Possible responses:
● Indicate that the status is permissible and enable path feed:
● Disable path feed or entire channel:
DB31, ... DBX83.5 (spindle in setpoint range) is processed
Safety Integrated
In addition to the limit value MD36931 $MA_SAFE_VELO_LIMIT, depending on the active safety
speed level SG1 ... SGn, the following machine data should be taken into account:
● MD36932 $MA_ SAFE_VELO_OVR_FACTOR
● MD36933 $MA_SAFE_DES_VELO_LIMIT
Example:
All standard limit values are greater than 1500 rpm.
● SG1 is active
● MD36932 $MA_ SAFE_VELO_OVR_FACTOR[<SG1>] = 1111.11111 [rpm]
● MD36933 $MA_SAFE_DES_VELO_LIMIT[<SG1>] = 90%
Programming: M3 S1500
The speed setpoint is limited to 1000 rpm (MD36932 * MD36933).
DB31, ... DBX83.1 = 1
Corresponding to ... DB21, ... DBX6.0 (feed disable)
DB31, ... DBX4.3 (feed/spindle stop)
DB31, ... DBX83.5 (spindle in setpoint range)
DB31, ...
DBX83.2 Setpoint speed increased (programmed speed too low)
Edge evaluation: Yes
Edge change 0 → 1 The effective setpoint speed is below the current min. limit value. The setpoint speed is limited to this
limit.
Limit values:
● MD35120 $MA_GEAR_STEP_MIN_VELO (minimum speed for automatic gear stage selection
● MD35140 $MA_GEAR_STEP_MIN_VELO_LIMIT (minimum speed of the gear stage)
● G25 (lower spindle speed limitation)
Edge change 1 → 0 The set speed of the spindle is outside the minimum limit value.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
DB21, ... DBX6.0 = 0 (feed disable)
DB21, ... DBX6.0 = 1 (feed disable)
Signal(s) updated: Cyclically
M40)
Z1: NC/PLC interface signals
19.11 Spindles (S1)
1645