Festo CMMO-ST-C5-1-DION, Original Instructions Manual

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2 Product description
Festo – GDCP-CMMO-ST-EA-SY-EN – 2017-05c – English 39
Homing to reference switch (without index)
Requirement is for parameterisation of reference switch (NO, NC)
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FCT [...][Axis] Axis Options. Hom­
ing without index evaluation is possible in open-loop as well as closed-loop operation. In open-loop
operation, no stop can be detected. The actuator therefore must always be positioned before the start
of a homing run so that it can find the switch in the parameterised direction.
Homing to reference switch
1)
Controlled operation
1. Search for the reference switch with search speed in the parameterised direction.
– Switch not found: termination after the parameterised time (Time-out)
2)
with error message 0x22
2. Reference switch found: position at crawling speed in opposite direction until the reference
switch is disabled. This position is taken as the homing point.
3)
Direction: positive Direction: negative
Homing Switch
Time-out
0x22
Homing Switch
Time-out
0x22
Controlled operation
1. Search for the reference switch with search speed in the parameterised direction.
– Switch not found: position to stop, search in opposite direction.
– Switch not found in opposite direction: termination with error message 0x22.
2. Reference switch found: position at crawling speed in opposite direction until the reference
switch is disabled. This position is taken as the homing point.
3)
Direction: positive Direction: negative
Homing Switch Homing Switch
1) If the reference switch is enabled when a homing run starts, step 2 is executed immediately
2) FCT [...][Axis][Homing] Settings: Timeout
3) Homing option “Position to axis zero point”
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Tab. 2.26
Tab. 2.33 Homing method – reference switch without index