Festo Электроцилиндр - Manual (Page 21)

2 Overview
Festo – GDCP-CMMO-ST-EA-SY-EN – 1301a – English 21
2.6.3 Prefix and direction of rotation
All points and offsets have a sign prefix. The following applies for EPCO type drives (unless reversal of
direction has been activated):
Value Direction
+ Positive values face from the basis point in the direction of the extended end position.
– Negative values face from the basis point in the direction of the retracted end position.
2.6.4 Units of measurement
During parameterisation via a web browser or FCT you can use commonly used units for length
specifications, such as millimetres or inches.
If you are using CVE objects, you will need the so-called interface increments SINC ( appendix B.2).
2.7 Homing run
A homing run must be performed every time the logic voltage supply is switched on in order to anchor
the reference point and the measuring reference system in the positioning range of the axis. A drive
function cannot be started without a successful homing run (exception: jogging).
2.7.1 Homing overview
– Homing methods to a fixed stop
( section 2.7.2)
– Homing methods to reference switch with/without index
( section 2.7.3)
– Homing method “current position”
( section 2.7.4)
– Automatic homing (valve profile)
( section 2.7.5)
– Movement to zero
( section 2.7.6)