Siemens SINAMICS S120 Function Manual page 457

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Maximum acceleration/deceleration

Parameter p2572 (maximum acceleration) and p2573 (maximum deceleration) define the

maximum acceleration and the maximum deceleration. In both cases, the units are 1000

Both values are relevant for:

● Processing traversing blocks

● Direct setpoint specification / MDI for positioning and setting up

● Reference point approach

The parameters do not have any effect when faults occur with the fault responses

OFF1/OFF2/OFF3.

In the traversing blocks mode, the acceleration and deceleration can be set in multiple

integer steps (1%, 2% ... 100%) of the maximum acceleration and deceleration. In the "Direct

setpoint specification / MDI" mode for positioning and setting up, the

acceleration/deceleration override (assignment of 4000 hex = 100%) is specified.

A maximum acceleration or deceleration dependent on the actual velocity (transitioned

acceleration) is not supported.

When using the PROFIdrive telegram 110, the velocity override is already connected and

has to be supplied by the telegram.

Software limit switch

The connector inputs p2578 (software limit switch minus) and p2579 (software limit switch

plus) limit the position setpoint if the following prerequisites are fulfilled:

● The software limit switches are activated (p2582 = "1")

● The reference point is set (r2684.11 = 1)

● The modulo correction is not active (p2577 = "0")

The connector inputs are, in the factory setting, linked to the connector output p2580

(software limit switch minus) and p2581 (software limit switch plus).

Drive functions

Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3

Function modules

7.8 Basic positioner