
IP 266 Fundamentals of Positioning
4 Fundamentals of Positioning
Positioning means bringing a load to a certain position within a specific period of
time, making allowance for force and torque.
Various methods are used to perform this task.
4.1 Positioning Methods
A drive can be positioned in one of two ways:
• under open-loop control
• under closed-loop control
The figure below shows the options available in conjunction with S5-100U
programmable controllers.
Figure 4-1. Positioning Methods
Positioning
Open-loop controlClosed-loop control
Three-phase AC
drives
IP266 positioning
module
Fixed-speed drives Stepping motors
385 B high-speed
counter
IP 267 positioning
module
DC drives
EWA 4NEB 812 6057-02
4-1
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