Siemens SINUMERIK 828D Function Manual

Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
1635
DB31, ...
DBX21.3 - DBX21.4 Motor selection A, B
Edge evaluation: No Signal(s) updated: Cyclic
Meaning The PLC can switch between 4 different motors or motor mode types using the motor selection
function.
The following assignment applies:
As soon as a new motor selection is detected, the drive cancels the pulse enable (feedback signal
using the interface signal DB31, ... DBX93.3 and 4 (active motor)).
Using the motor selection, it is possible, for example, to choose mode 1 as star-connected operation
and mode 2 as delta-connection operation for the main spindle drive (MSD).
The drive signals the currently selected motor back to the PLC using the interface signals:
DB31, ... DBX93.3 and 4 (active motor).
Application
example(s)
Timing for stardelta switchover
Special cases,
errors, ....
Caution:
Before a new motor is selected, the interface signal:
DB31, ... DBX21.5 (motor being selected)
must be set to 0!
Corresponding to ... DB31, ... DBX93.3 and 4 (active motor)
DB31, ... DBX21.5 (motor being selected)
Additional
references
/IDsl/ Commissioning Manual IBN CNC: NCK, PLC, Drive
DB31, ...
DBX21.5 Motor being selected
Edge evaluation: no Signal(s) updated: Cyclic
Signal state 1 or
edge change
0 → 1
The PLC outputs the interface signal:
DB31, ... DBX21.5 (motor being selected)
to the drive to confirm that the external contactor has been switched over to the new motor (e.g. that
motor contactor 2 has been energized as part of the star/delta switchover process).
The pulses are then enabled by the drive.
Signal state 0 or
edge change
1 → 0
The interface signal:
DB31, ... DBX21.5 (motor being selected)
must be reset to 0 by the PLC user program before a new motor is selected! Otherwise the pulses
from the drive might be enabled too early.
Corresponding to ... DB31, ... DBX93.3 and 4 (active motor)
DB31, ... DBX21.3 and 4 (motor selection A, B)
Additional
references
/IDsl/ Commissioning Manual IBN CNC: NCK, PLC, Drive
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Siemens SINUMERIK 828D Specifications

General

Control Type	CNC
Operating System	Windows Embedded
Processor	Intel Atom
Display	10.4" color TFT display
Interfaces	Ethernet, USB
Programming	ShopMill, ShopTurn
Operation Panel Size	10.4"
Protection Class	IP65
PLC Memory	2 MB
Spindle Capacity	4 spindles
Hard Drive	CompactFlash