Festo Электроцилиндр - Manual (Page 25)

2 Overview
Festo – GDCP-CMMO-ST-EA-SY-EN – 1301a – English 25
2.7.6 Movement to zero
A movement to zero is possible after a homing run. This is where the drive moves to the parameterised
axis zero point after finding the reference point.
Whether or not a movement to zero is executed can be defined as a homing run parameter in FCT. The
movement to zero is required when homing to the stop; the minimum offset to the axis zero point is
1 mm.
If a movement to zero is not executed, the drive remains at position (-1) * offset axis zero point. Make
sure that this position is not outside the software end positions.
If a movement to zero is to follow a homing run, “Motion complete” will only appear after
completion of the movement to zero. Motion Complete remains inactive between the
homing run and movement to zero.
A movement to zero should be executed when homing to the stop in order to exit the
stop position. Otherwise the drive could be driven continuously against an elastic stop,
which would result in a strong temperature increase and eventually lead to the controller
shutting down.
2.8 Monitoring functions
A complex system of sensors and monitoring functions ensures operational reliability:
– Voltage monitoring: detection of undervoltages and overvoltages in the logic and load voltage
supply.
– Temperature monitoring: output stage and CPU temperature in the CMMO-ST.
– I
2
t monitoring/overload protection
– Software end position recognition
– In the binary profile: contouring error monitoring (e.g.in the event of sluggishness or overloading of
the drive).