840Di-specific data and functions
18.3 Travel to fixed stop with high-resolution torque reduction
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
605
18.3.2
Comparison
Automatic adjustment
To simplify the torque reduction commissioning, the SINUMERIK 840Di sl NC tries to
perform, by default, an automatic adjustment using the torque reduction evaluation
configured in the drive. To do this the NC reads the relevant drive parameters and applies
the value converted to NC format in the machine data:
●
MD37620 $MA_PROFIBUS_TORQUE_RED_RESOL
The following requirements must be met:
●
The drive supports acyclic PROFIBUS communication.
●
The drive has a parameter to standardize torque reduction.
●
In the NC, acyclic communication with the drive is enabled with:
–
MD13070 $MN_DRIVE_FUNCTION_MASK[n], Bit 15 == 1
Manual comparison
If the requirements for automatic adjustment of the NC and drive are not met, the adjustment
must be performed manually in the drive and NC.
18.3.3
Parameter assignment: SINAMICS S120
Message frame
The drive must be operated with one of the following message frames:
●
Message frame 102, 103, 105, 106 ,116
Drive parameters
The evaluation of torque reduction is set using the parameter:
●
p1544 Torque reduction evaluation [%]
Normalization: 1% ≙ 16384
D
= 4000
H
