Siemens SINUMERIK 840D sl Function Manual page 33

DB31, ... DBX93.3, 4 (active motor A, B)
The drive module (MSD) sends this checkback to the PLC to indicate which of the 4 motor
types or motor operating modes is active.
The following selections can be made on the main spindle drive:
• Star mode (A=0, B=0)
• Delta mode (A=1, B=0)
On the 611D with Performance2 controller module and 611U, combinations A = 0, B = 1 and
A = 1, B = 1 may also be selected.
DB31, ... DBX93.5 (DRIVE ready)
Checkback signal indicating that the drive is ready. The conditions required for traversing the
axis/spindle are fulfilled.
DB31, ... DBX93.6 (integrator n-controller disabled) (not on 810D)
The speed-controller integrator is disabled. The speed controller has thus been switched
from PI to P controller.
DB31, ... DBX93.7 (pulses enabled)
The pulse enable for the drive module is available. The axis/spindle can now be traversed.
DB31, ... DBX94.0 (motor temperature prewarning)
The motor temperature has exceeded the warning threshold. If the motor temperature
remains at this level, the drive will be stopped after a defined time (drive MD) and the pulse
enable removed.
DB31, ... DBX94.1 (heat-sink temperature prewarning)
The heat-sink temperature has exceeded the warning threshold. The pulse enable will be
removed for the drive module in question after 20 seconds.
DB31, ... DBX94.2 (ramp-up function completed)
This signal indicates that the actual speed value has reached the new setpoint allowing for
the tolerance band set in drive machine data:
MD1426 $MD_SPEED_DES_EQ_ACT_TOL (indicate tolerance band for 'nsoll=nist')
The acceleration procedure is thus completed. Any subsequent speed fluctuations due to
load changes will not affect the interface signal.
Basic logic functions: Various NC/PLC interface signals and functions (A2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Detailed description
2.1 NC/PLC interface signals
27