Position Actual Value Conditioning - Siemens SINAMICS S120 Function Manual

Function diagrams (refer to the List Manual)
S 4010
S 4015
S 4020
S 4025
4.23.3

Position actual value conditioning

Features
S Correction value (p2512, p2513)
S Setting value (p2514, p2515)
S Position offset (p2516)
S Position actual value (r2521)
S Velocity actual value (r2522)
S Motor revolutions (p2504)
S Load revolutions (p2505)
S Spindle pitch (p2506)
Description
The position actual value conditioning implements the conditioning of the position
actual value in a neutral position unit LU (LENGTH UNIT). To do this, the function
block uses the encoder evaluation/motor control with the available encoder inter-
faces Gn_XIST1, Gn_XIST2, Gn_STW and Gn_ZSW. These just provide position
information in encoder pulses and fine resolution (increments).
The position actual value is conditioned independently of whether the position con-
troller is enabled immediately after the system has booted and as soon as valid
values are received via the encoder interface.
Parameter p2502 (encoder assignment) is used to define from which encoder (1, 2
or 3), the position actual value is sensed.
The following interconnections are automatically established after the assignment
has been made.
S p0480[0] (G1_STW) = encoder control word r2520[0]
S p0480[1] (G2_STW) = encoder control word r2520[1]
S p0480[2] (G3_STW) = encoder control word r2520[2]
© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition
Position actual value conditioning
Position controller
Standstill/positioning monitoring
Dynamic following error monitoring cam controller
Extended Functions
Function module position control
4-237