Siemens SINUMERIK 840C Installation Instructions Manual page 456

10.94
With a setting of, for example, 100 %, the rated torque acts as the torque limit up to rated
speed. At speeds above the rated value, the torque limit curve drops in proportion to 1/n so
that the rated output is reached in each case. MD 270 - MD 273, MD 47 and MD 290 are the
corresponding machine data.
270
Default value
100
Input of torque limit for braking operation (generator-mode torque limit). This input value is
referred to the maximum motor-mode torque (see also MD 269).
271
Default value
50
Input of 2nd torque limit value referred to the 1st torque limit (MD 269). This 2nd torque limit
can be selected via the PLC control word and machine data MD 290.
272
Default value
500
Input of speed above which the generator-mode limit set in machine data MD 270 is applied
(see also MD 269).
273
Default value
20
Input of hysteresis for the switchover speed set in machine data MD 272 (see also MD 269).
274
Cut-in speed torque setpoint smoothing motor 2
Default value
4 000
Input of speed value above which the torque setpoint smoothing function activated in machine
data MD 44 is applied.
©
Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
Generative limitation motor 2
Lower input limit Upper input limit
5
2nd torque limiting value motor 2
Lower input limit Upper input limit
5
Switchover speed for MD 270 motor 2
Lower input limit Upper input limit
Maximum motor
0
Hysteresis MD 272 motor 2
Lower input limit Upper input limit
Maximum motor
0
Lower input limit Upper input limit
Maximum motor
0
6FC5197- AA50
7 Drive Machine Data (SIMODRIVE Drive MD)
7.1.2 MSD MD (data description - SW 3)
Units
100 %
Units
100 %
Units
rev/min
speed
Units
rev/min
speed
Units
rev/min
speed
Active
at once
Active
at once
Active
at once
Active
at once
Active
at once
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