Siemens SIMATIC FM 453, Manual

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9-75
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
9.7.2 Servo Position Control
In the servo position control function, the setpoint characteristic specified by
the interpolation function is implemented in conjunction with the feed drive
of the machine or installation in the form of a traverse movement of the axis .
The following axis configurations are possible, depending on the parameter-
ization:
MD61 MD10 Axis Configuration
0 0 Servo drive, speed positioned without encoder
1 Servo drive in position controller with incremental encoder
3, 4, 13, 14 Servo drive in position controller with absolute encoder
1 0 Step drive in position controller without encoder, with FM-in-
ternal pulse feedback
1 Step drive in position controller with incremental encoder
3, 4, 13, 14 Step drive in position controller with absolute encoder
7 – Step drive in open-loop control mode
This function is subdivided into subfunctions as shown below, which are then
described in detail:
From encoder
(actual value)
Example: Channel 1
X2
Error signals
Position
comparitor
From interpolation
Backlash
compen- sation
Position con-
troller
Control
diagnostics
To actuating signal
driver
Target speed
MD24
MD25
MD26
MD37
MD39
+
+
+
–
MD30
MD31
Controller
ready Enable CL
controller
Following
error
MD19
MD37
From drive actuation
v(
t)
Drift
compensation
Fig. 9-10 Overview of Servo Position Control Function
Overview
Description of Functions