Signals To Axis/Spindle (Digital Drives) - Siemens SINUMERIK 840D sl Function Manual

A2: Various NC/PLC interface signals and functions
2.2 NC/PLC interface signals - only 840D sl
2.2.8

Signals to axis/spindle (digital drives)

DB31, ... DBX21.0 - 4 (requesting a switchover of a motor and/or drive data set)
The PLC issues a request to the drive to switch over to a new motor and/or drive data set.
The interface can be flexibly parameterized using: DB31, ... .DBX130.0 - 4 (see Chapter
"Switching over motor/drive data sets (Page 65)")
The active motor and/or drive data set is indicated using: DB31, ... DBX93.0 - 4
Note
Main spindle drive
For a main spindle drive, only motor data sets 1 and 2 are valid when switching over between
a star and delta connection.
● Motor data set 1: Star
● Motor data set 2: Delta
DB31, ... DBX21.5 (Motor selection done)
The PLC user program sends this signal to the drive to indicate successful motor selection.
The pulses are then enabled by the drive.
DB31, ... DBX21.6 (integrator disable, n-controller)
The PLC user program inhibits the integrator of the speed controller for the drive. The speed
controller is switched over from a PI to P controller.
If the speed controller integrator disable is activated, compensations might take place in certain
applications (e.g. if the integrator was already holding a load while stationary).
Feedback signal via: DB31, ... DBX93.6 = 1 (integrator n-controller disabled)
DB31, ... DBX21.7 (request pulse enable)
The pulse enable for the drive module is only requested if all enable signals (hardware and
software) are pending:
● Trigger equipment enable
● Controller and pulse enable
● Pulse enable (safe operating stop)
● Stored hardware input
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions