Specifications

IP 240 Positioning
b) If the IP outputs are to be controlled by the module firmware (HAND=0), they can be
enabled immediately (FREI=1).
If the IP 240 controls the direction of travel during positioning (DAV=2), you must also set
control bit DA1S or DA2S for reference point approach to specify which input is to be set.
AMSK ZYSY SOSY HASY DA2S DA1S HAND FREI
0/1 0 0 1 0/1 1/0 0 1
Following transfer of the HASY control bit,
• the SYNC bit is set to ”0” and
• range bits BEE1 to 3 and direction bit RICH are set to ”1”, as the last position number
selected was invalid. Position number ”255” is always returned ( Section 10.16).
The reference point approach is started when the outputs are enabled.
3) When the preliminary contact is reached, bit BEE1 is set to ”0” and the traversing speed
switched to creep speed.
If the IP 240 controls the traversing speed (DAV=0 or 1, HAND=0), the speed is always
switched to creep when the preliminary contact is reached.
If the IP 240 controls the direction of travel, you can monitor reaching of the preliminary
contact by evaluating status bit BEE1 or interrupt bit BE1.
4) When the preliminary contact is exited, status bit BEE1 is set back to ”1”.
5) Synchronization is initiated by the first zero mark signal that follows the preliminary contact
signal.
• The IP output still active is reset (HAND=0)
• Status bit SYNC is set.
• The actual value is set to the most recently specified zero offset value.
• Status bit BEE2 is set to ”0” and interrupt BE2 generated.
6) Reference point approach is exited.
To quit reference point approach, set HASY to ”0” and transfer it to the IP 240. The first po-
sition number may also be selected ( Section 10.14.1). Status bit BEE2 is set to ”1”.
7) Block outputs
For blocking the IP outputs, FREI is to be set to ”0” and transferred to the IP. In doing so, the
first position number may also be selected. ( Section 10.14.1).
Note
If the HASY and FREI control bits are set to ”0” while quitting the reference point
approach, zero mark monitoring ( Section 10.9) is not started.
EWA 4NEB 811 6120-02a 10-41