Siemens SINAMICS S120 Function Manual page 645

NSET_A (speed setpoint A (16-bit))
● Speed setpoint with a 16-bit resolution with sign bit.
● Bit 15 determines the sign of the setpoint:
● The speed is normalized via p2000.
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:
● The speed is normalized via p2000.
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
MT_STW
CU_STW1
These process data are part of the central process data.
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
– Bit = 0 → Positive setpoint
– Bit = 1 → Negative setpoint
NSET_A = 4000 hex or 16384 dec ≐ speed in p2000
– Bit = 0 → Positive setpoint
– Bit = 1 → Negative setpoint
NSET_B = 4000 0000 hex or 1 073 741 824 dec ≐ speed in p2000
Figure 10-5 Normalization of speed
10.1 Communication according to PROFIdrive
Communication
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