Detailed Description
2.1 Various interface signals and functions (A2)
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
39
DB31, ...
DBX20.2
Torque limit 2
Edge evaluation: no Signal(s) updated: cyclic
Signal state 1 or
edge change
0 → 1
Torque limit 2 is requested by the PLC for the axis/spindle.
For 611D two torque limit values can be set for each axis/spindle, whereby torque limit 2 refers to
torque limit 1 (reduction factor). Torque limit 2 is selected via the interface. The limit value is defined
using the drive parameters.
As soon as torque limit 2 is active for the drive, the drive signals this using the interface signal:
DB31, ... DBX92.2 (torque limit 2 active)
Signal state 0 or
edge change
1 → 0
Only torque limit 1 has been selected by the PLC.
Signal irrelevant for
...
SINUMERIKI 840Di
Application
example(s)
In order to reduce the stress on the mechanics and workpiece, the actual torque limit can be
reduced using torque limit 2 for certain machining operations.
Corresponding to .... DB31, ... DBX92.2 (torque limit 2 active)
Additional references /IAD/ SINUMERIK 840D Startup Guide; Chapter: SIMODRIVE 611D
DB31, ...
DBX20.3
Speed setpoint smoothing
Edge evaluation: no Signal(s) updated: cyclic
Signal state 1 or
edge change
0 → 1
The PLC requests a filter to smooth the speed setpoint value.
In the drive module the interface signal is only effective under the following conditions:
• Speed setpoint filter 1 is active in the drive
• speed setpoint filter 1 has been configured as a lowpass filter (i.e. not as a bandstop filter)
As soon as these conditions exist whereby the smoothing of the speed setpoint is active, the 611D
or 611U signals this to the PLC using the interface signal:
DB31, ... DBX92.3 (speed setpoint smoothing active).
Signal state 0 or
edge change
1 → 0
No smoothing of the speed setpoint value is requested by the PLC.
Application
example(s)
With this interface signal, speed setpoint smoothing can - for example - be activated from the PLC
user program for a spindle during speed control to achieve smooth torque output. Speed setpoint
smoothing can therefore be deactivated when the spindle is in positioning mode.
Special cases,
errors, ....
Corresponding to .... DB31, ... DBX92.3 (speed setpoint smoothing active)
Additional references /IAD/ SINUMERIK 840D Startup Guide; Chapter: SIMODRIVE 611D
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