Torque Limits - Siemens SINUMERIK 840D sl Function Manual

8.6.3

Torque limits

The torque limits p1520[0] and p1521[0] and the reference torque p2003 are pre-assigned
when commissioning the motor. The torque limits and the reference torque are pre-assigned
differently depending on the technological application p0500, and dependent on the hardware
components being used.
p500 and the resulting pre-assignment of p0640 , p2003 , p1520 , p1521:
1. p500 100 (default) - and as a result:
–
–
–
–
2. p500 101 (feed drive) - and as a result:
– p2003 p338 * p316
– p1520 p323 * p316
– p1521 -(p323 * p316)
– p0640 minimum (p338, r209)
3. p500 102 (spindle drive) - and as a result:
– p2003 = r0333 rated motor torque
– p1520 = r0333 rated motor torque
– p1521 = - r0333 rated motor torque
– p0640 = minimum (p304*1.5, r209)
The currently active torques can be read in parameters:
● r1538 display of the currently active upper torque limit
● r1539 display of the currently active lower torque limit
Further, the torque limits p1522[0] and p1523[0] are pre-assigned as follows:
● p1522[0] 63:2902:5 reference to +100% referred to p2003 in the same Motor Module
● p1523[0] 63:2902:12 reference to -100% referred to p2003 in the same Motor Module
When using the Safe Brake Test, these pre-assignments for p1522[0] / p1523[0] may not be
changed.
However, when upgrading the software, the following setting, which is also permissible, can
be present:
● p1522[0] 0:1.0 100% of p2003
● p1523[0] 63:2900.0 reference to p2900 in the same Motor Module
● p2900[0] -100% -100% from p2003
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
p2003 = r0333 rated motor torque
p1520 = r0333 rated motor torque
p1521 = - r0333 rated motor torque
p0640 = minimum (p304, r209)
Connecting sensors and actuators
8.6 Safe Brake Test (SBT)
295