Siemens SINUMERIK 840D sl Function Manual page 1577

DB31, ...
DBX21.5
Motor being selected
Edge evaluation: No
Signal state 1 The necessary electrical and/or mechanical switchover operations (e.g. contactor switchover for star-
delta switchover) have been completed.
The axis can be traversed again. The pulses are then enabled by the drive.
Note
The interface signal must be reset before a request to switch over to a new motor data set (MDS)
and/or drive data set (DDS) (DB31, ... DBX21.0 - 4).
Signal state 0 The necessary electrical (e.g. contactor switchover for star-delta switchover) and/or mechanical
switchovers are not complete. The axis must not traverse. The pulses are not enabled by the drive.
Corresponding to ... DB31, ... DBX21.0 - 4 (motor/drive data set: request interface)
DB31, ... DBX93.0 - 4 (motor/drive data set: display interface)
DB31, ...DBX130.0 - 4 (motor/drive data set: formatting interface)
Additional references ● Function Manual, Basic Functions, Chapter "A2: Various NC/PLC interface signals and functions"
● CNC Commissioning Manual: NCK, PLC, Drive
DB31, ...
DBX21.6
Integrator disable, speed controller
Edge evaluation: No
Signal state 1 The integrator (I component) of the speed controller is disabled or is to be disabled (P instead of PI
behavior).
Note:
If the speed controller integrator disable is activated, compensation operations may occur in certain
applications (e.g. if the integrator was already holding a load while stationary).
The drive acknowledges the integrator disable to the PLC using the interface signal:
DB31, ... DBX93.6 (speed controller integrator disabled).
Signal state 0 The integrator (I component) of the speed controller is enabled (PI behavior).
Corresponding to ... DB31, ... DBX93.6 (feedback: The speed controller integrator is disabled)
Additional references CNC Commissioning Manual: NCK, PLC, Drive
DB31, ...
DBX21.7
Pulse enable
Edge evaluation: No
Signal state 1 The pulses are enabled for the drive.
The pulse enable is only performed in the drive when the drive signals readiness:
DB31, ... DBX93.5 == 1 (feedback: Drive ready)
Signal state 0 The pulses are disabled for the drive.
Application exam‐ Signal relevant to safety
ple(s)
Special cases, If the pulse enable is removed during motion (e.g. emergency stop), the axis/spindle is no longer
errors, .... braked under control. The axis coasts to standstill.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Signal(s) updated: Cyclically
> "Switchover motor/drive data sets"
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
1577