Siemens Sinamics S120 Function Manual page 68

Extended setpoint channel
2.9 Ramp-function generator
Figure 2-14 Ramp-function generator tracking
Without ramp-function generator tracking
● p1145 = 0
● Drive accelerates until t2 although setpoint < actual value
With ramp-function generator tracking
● At p1145 > 1 (values between 0 and 1 are not applicable), ramp-function generator
● t1 and t2 almost identical
Function diagrams (see SINAMICS S120/S150 List Manual)
● 1550 Setpoint channel
● 3060 Basic ramp-function generator
● 3070 Extended ramp-function generator
● 3080 Ramp-function generator selection, status word, tracking
Signal overview (see SINAMICS S120/S150 List Manual)
● Control signal STW1.2 OFF3
● Control signal STW1.4 Enable ramp-function generator
● Control signal STW1.5 Start/stop ramp-function generator
● Control signal STW1.6 Enable setpoint
● Control signal STW2.1 Bypass ramp-function generator
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● p0893 ESR speed
● p1051 [0...n] CI: Speed limit in RFG, positive direction of rotation
66
tracking is activated when the torque limit is approached. The ramp-function generator
output thereby only exceeds the actual speed value by a deviation value that can be
defined in p1145.
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions