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10.1 Single Break function
The Focus II will power-up with its safety outputs off and enter the lock state if the detection zone is
clear. After power-up, a manual restart is necessary to start the single break function. Focus II system
will enter the run state when the detection zone is entered and cleared again. It will change to lock state
automatically when one cycle of the machine is finished. The cycle can be restarted by entering and
clearing the detection zone again.
Each operating cycle monitored by the single break function works as follows:
• Protective f i eld is interrupted and free again (load or unload manually)
• Safety outputs enter run state and machine operates
• While the machine is in operation the feedback is not tested
• When end position is reached, the feedback input provide a high to low transition.
• Safety outputs enter stop state
10.2 Double Break function
This operation mode is similar to single break operation except: Operator is doing a loading and an
unloading cycle manually. Focus II system will enter the run state when the detection zone is entered and
cleared again twice.
Each operating cycle monitored by the double break function works as follows:
• Protective f i eld is interrupted and free again first time (unload)
• Protective f i eld is interrupted and free again second time (load)
• Safety outputs enter run state and machine operates
• While the machine is in operation the feedback is not tested
• When end position is reached, the feedback input provide a high to low transition.
• Safety outputs enter stop state
2TLC172015M0201, rev. D
40
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