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switches are "active" if the signals of the hardware limit switches are recognized as "0" at the
binector inputs.
You can test the function of a hardware limit switch by approaching the hardware limit switch
in position-controlled operation of the axis (e.g. with the "Jog" function).
Moving beyond the hardware limit switches (STOP cams)
For maintenance work, it may be necessary for the axis to traverse beyond the activated
hardware limit switches (STOP cams).
To ensure the ability for the axis to traverse beyond the hardware limit switches in position-
controlled operation, proceed as follows:
1. Deactivate the corresponding hardware limit switch (minus or plus).
2. Traverse the axis, position-controlled beyond the hardware limit switch.
If the axis traverses beyond the hardware limit switch in speed-controlled operation, the
following occurs:
1. When the hardware limit switch is initially approached, the converter stops the axis.
2. Depending on which direction the axis is traversing, the converter signals fault F07491
"EPOS: STOP cams, minus approached" or F07492 "EPOS: STOP cams, plus
approached".
After fault acknowledgment, it is possible for the speed-controlled axis to traverse further in
the same direction over the corresponding hardware limit switch.
If the position actual value resolution is not adequate in the speed-controlled mode, when
returning to the positioning range, the converter cannot identify whether the axis is again
within the positioning range. As a consequence, the converter prevents the axis from being
traversed in the position-controlled mode.
You must select the level-triggered evaluation of the hardware limit switches to guarantee
position-controlled traversing of the axis, even if the position actual value resolution is not
adequate.
Requirement:
● The hardware limit switch extends up to the end of the machine.
Procedure:
1. The level-triggered evaluation of the hardware limit switch is selected using p2584.01 = 1.
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
NOTICE
Damaging the machine by traveling past a hardware limit switch
Traveling past a hardware limit switch can damage the machine.
• Monitor axis motion, and manually stop the axis in plenty of time, e.g. using an
EMERGENCY STOP.
Functions, monitoring and protective functions
9.4 Extended functions
657
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