Siemens SINAMICS DCM Operating Instructions Manual page 388

Descriptions of functions
10.3 Communication according to PROFIdrive
NSET_B (speed setpoint B (32-bit))
● Speed setpoint with a 32-bit resolution with sign bit.
● Bit 31 determines the sign of the setpoint:
– Bit = 0 → Positive setpoint
– Bit = 1 → Negative setpoint
● The speed is normalized via p2000.
NSET_B = 4000 0000 hex or 1 073 741 824 dec ≐ speed in p2000
Figure 10-3
Note
Operation of motors in the field-weakening range
If the motors are to be operated in the field-weakening range > 2:1, the value of parameter
p2000 must be set ≤ 1/2 x maximum speed of the drive object.
Gn_STW (encoder n control word)
This process data belongs to the encoder interface.
A_DIGITAL
CU_STW1
This process data is part of the central process data.
386
Normalization of speed
SINAMICS DCM Control Module
Operating Instructions, 12/2018, A5E34888669A