Specifications

IP 240 Positioning
10 Positioning
10.1 Application and Functional Description
10.1.1 Application
In this mode, the IP 240 enables controlled positioning with cut-off points.
Incremental encoders must be used to generate the path-dependent signals. To acquire the enco-
der signals, the IP 240 is equipped with counter chips which can process encoder signal trains of up
to 500 kHz from symmetrical encoders and of up to 50 kHz from asymmetrical encoders. To
evaluate the encoder signals, the IP 240 compares the computed actual value with the specified
setpoints in every module firmware cycle (the firmware is the IP 240's operating system) and
initiates the programmed reactions.
The various configuring and synchronization options make it possible to use the IP 240:
• for positioning tasks in which the IP 240 controls the positioning drive (e.g. control of hand-
ling units etc.)
• for control tasks in which actual value-dependent post-processing steps are required (e.g.
labeling etc.) and
• for gate-controlled counting of encoder pulses (e.g. length measurement etc.).
Fig. 10-1. Overview of IP 240 Configuring and Synchronization Options
With backlash compensation
Linear axis
Controlling the direction of travel
over the IP outputs
Without backlash compensation
Collective setting of
IP outputs D1 and D2
Separate setting of
IP outputs D1 and D2
Rotary axis
IP 240 configuring options
Controlling the traverse speed
over the IP outputs
With external signalWith internal control bit
IP 240 synchronization options
With reference point approach
Position selection
EWA 4NEB 811 6120-02a 10-1