Characteristic Of The Following Error; During A Positioning Operation - Siemens SIMATIC S5 Manual

Fundamentals of Positioning
Driven by the power section, the drive travels a specific path. In accordance with
the distance traversed, the position encoder generates a number of pulses which
are evaluated by the IP 266's input section. The actual position of the drive is
computed from the pulse count and the value for the encoder resolution. This
value is called the actual value.
The difference between the setpoint S
to as the following error s:
Figure 4-6 shows the characteristic of the following error during a positioning
operation.
S
(t)
a
S
Figure 4-6. Characteristic of the Following Error
4-6
and the actual value S
(t)
setp
s = S - S
(t)
setp act
s
b
t
0
s = const

During a Positioning Operation

(t)
act
(t)
t
a = Setpoint characteristic
t
b = Actual characteristic
EWA 4NEB 812 6057-02
IP 266
is referred