Festo MTR-DCI-...IO Series, Description, Page: 28 / 182

1. System summary
1-10
Festo P.BE-MTR-DCI-IO-EN en 1209d
Warning
•
Please note that the MTR-DCI-…IO does not have a sep-
arate logic voltage supply.
•
Check the measures which are necessary within the
framework of your EMERGENCY STOP circuit for switch-
ing your machine/system into a safe state in the event
of an EMERGENCY STOP.
•
If corresponding EMERGENCY STOP circuitry is neces-
sary for your application, use additional, separated
safety limit switches (e.g. as normally closed limit
switches wired in series connection)
– Cancelling the ENABLE signal at the controller inter-
face
– Switch off the load voltage.
1.5 Measuring reference system
For commissioning, a measuring reference system for refer-
encing the reference coordinates must be defined. By means
of the measuring system all (absolute) positions are defined
and movement can be made to them.
1.5.1 Basis points and work range
The basis system of the MTR-DCI is based on the axis zero
point which is defined by the offset to the reference point.
Homing run The position of the reference point REF is defined by a hom-
ing run. When a homing run is finished, the drive stands at
the axis zero point AZ.
Homing method The homing method defines the way in which the reference
point is determined.
Homing point REF forms the mechanical starting point of the measuring refer-
ence system and is defined for the homing run by a reference
switch or a fixed stop, depending on the homing method. It
is the reference point of the axis zero point.