Specifications

IP 240 Positioning
Interrupting a reference point approach
You can interrupt a reference point approach by transferring
• control bit HASY = 0 or
• control bit FREI = 0 to the IP 240.
When the reference point approach is interrupted with HASY=0 and FREI=1, the IP outputs are
disabled only when they are are under IP 240 module firmware control during reference point
approach (HAND=0).
Fig. 10-26. Interrupting a Reference Point Approach with HASY=0 (HAND=0)
Start of the first reference
point approach
Start of the second
reference point approach
Interruption of reference point
approach with HASY=0
Control bit
HASY
Control bit
FREI
IP output
When a reference point approach is interrupted with FREI=0, the IP outputs are always disabled.
Before a new reference point approach can be started, the old reference point approach must
first be deselected with HASY=0. HASY=0 can be transferred together with FREI=0.
Fig. 10-27. Interrupting a Reference Point Approach with FREI=0
IP output
Control bit
FREI
Control bit
HASY
Start of the first reference
point approach
Interruption of the reference
point approach with FREI=0
Start of the second
reference point approach
10.13.2 Software-Controlled Synchronization
Synchronization can be carried out at any point in the traversing range by transferring a control
bit with a value of ”1”. This reactivates the position last selected. Software-controlled synchroni-
zation is also possible when the channel's outputs are set.
The SOSY control bit
Each time SOSY=1 is transferred, the IP 240 initiates software-controlled synchronization. This
means that
• the actual value is set to the value of the zero offset last transferred
• synchronization bit SYNC is set and
• the position last transferred is immediately reactivated. On the basis of the current actual
value,
- status bits BEE1 to 3 and RICH are updated,
- the enabled outputs are set and
- the configured interrupts are generated.
EWA 4NEB 811 6120-02a 10-45