Ramp-Function Generator - Siemens SINAMICS SIMOTICS S200 PROFINET Operating Instructions Manual

Functions
10.5 General functions
p4409
p4410
r4419
c4420
p4422.0
p4426
10.5.6

Ramp-function generator

Overview
The "ramp-function generator" function is used to limit acceleration in the event of abrupt
setpoint changes and thus helps prevent load surges during drive operation.
Description of function
The ramp-up time p1120 and ramp-down time p1121 can be used to set mutually independent
acceleration and deceleration ramps. This allows a controlled transition to be made in the event
of setpoint changes.
The maximum speed p1082 is used as a reference value for calculating the ramps from
the ramp-up and ramp-down time. For a quick stop (OFF3), a special adjustable ramp is
available via the ramp-down time p1135 (for example, for quick, controlled stopping after an
EMERGENCY OFF button has been pressed).
The following versions are available:
• Basic ramp-function generator (p1115 = 0)
• Extended ramp-function generator (p1115 = 1)
Basic ramp-function generator
The basic ramp-function generator is characterized by the following features:
• Ramp-up time T
• Ramp-down time T
You can see the properties of the ramp-function generator from the diagram below:
364
Gearbox encoder (motor)/PTO denominator (Control Unit)
Gearbox encoder (motor)/PTO numerator (Control Unit)
PTO diagnostics position setpoint
PTO position setpoint
PTO configuration
PTO zero mark offset
(p1120)
up
(p1121)
dn
SINAMICS S200 PROFINET servo drive system with SIMOTICS S-1FL2
Operating Instructions, 11/2023, FW V6.3, A5E51646752B AB