Axial Nc/Plc Interface Signals - Siemens SINUMERIK 840D sl Function Manual

Modulo rotary axes
• For slave axes, when the coupling is closed, the actual value displayed in the service
display is not modulo 360°. Independent of the setting in machine data:
MD30310 $MA_ROT_IS_MODULO[<slave axis>]
Spindles
• If a master-slave coupling is activated with spindles, the slave spindle is operated in the
open-loop speed controlled mode. The actual value of the slave spindle is not displayed as
modulo 360° in the service display. However, in the automatic basic display the actual
value is displayed as modulo 360°.
• If the spindles are accelerated at the current limit, this may mean that no adjusting
reserves are left over in the coupled state for the torque compensatory controller to use to
distribute the torque between the master and the slave as required.
• The maximum master spindle chuck speed must be configured in the following machine
data to be lower than or equal to that of the slave spindles:
MD35100 $MA_SPIND_VELO_LIMIT[<master spindle>]
• The axial velocity monitoring function should be adapted to the chuck speed:
MD36200 $MA_AX_VELO_LIMIT[<master spindle>]
12.8.2

Axial NC/PLC interface signals

• For slave axes, in the brake control logic, the NC/PLC interface signal: DB3x.DBX61.5
(position control active)
must no longer be evaluated. When the coupling is closed, the signal is no longer set.
Instead, the following NC/PLC interface signal should be used:
DB31, ... DBX96.7 (master-slave coupling active).
• When requested, and for a closed coupling, the following NC/PLC interface signals are
directly taken from the master axis for the slave axis:
DB31, ... DBX2.1 (controller enable)
DB31, ... DBX21.7 (pulse enable)
• When the controller enable is cancelled for the master axis:
DB31, ... DBX2.1 (controller enable) = 0
within the configured time of:
MD36610 $MA_AX_EMERGENCY_STOP_TIME
then this also results in interpolatory braking of the slave axis. The corresponding speed
and current controller enable signals are only cancelled after the configured time has
expired
MD36620 $MA_SERVO_DISABLE_DELAY_TIME
• In order to facilitate a standard braking behavior for all coupled axes, it is recommended
that the following parameters are set the same.
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Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
MD36620 $MA_SERVO_DISABLE_DELAY_TIME
p9560 (pulse suppression, shutdown speed)
p1228 (pulse suppression, delay time)
TE3: Speed/torque coupling, master-slave
12.8 Constraints
525