Festo Электроцилиндр - Manual (Page 19)

2 Overview
Festo – GDCP-CMMO-ST-EA-SY-EN – 1301a – English 19
Together with the I/O interface there are four logical interfaces, of which only one can have
higher-order control.
When the CMMO is switched on the I/O interface has master control. Any other logical interface can
take higher-order control from the I/O interface.
FCT can take master control from a web browser. This is not possible the other way around. The
change in higher-order control can be blocked by CVE with object #4.
2.5.1 Number of connections
Simultaneously permissible are a maximum of:
– 1 CVE connection
– 1 web browser connection
– 2 FCT connections, of which only one can have master control.
In total a maximum of two Ethernet connections are permissible simultaneously.
2.6 Measuring reference system
2.6.1 Basic concepts
Homing
The position of the reference point REF is ascertained during homing.
Movement to zero
Following the homing run: travel from the homing point to the axis zero point ( section 2.7.6).
Homing method
defines the way in which the reference point REF is ascertained.
Homing point REF
binds the measuring reference system, for example, to a proximity sensor or a fixed stop (depending
on the homing method).
Axis zero point AZ
is shifted by a defined distance from the reference point REF. But this offset can also be = 0.
The software limits and the project zero point refer to the axis zero point.
Project zero point PZ
is a point to which the actual position and the absolute target positions from the position record table
refer.
The project zero point is shifted by a defined distance from the axis zero point AZ. But this offset can
also be = 0.
Software end positions
limit the permitted positioning range (work stroke). If the target position of a positioning command
lies outside the software end positions, the positioning command will not be processed and an error
will be registered.
Usable Stroke
The distance between the two software limits. Maximum stroke by which the axis can move with the
set parameterisation.