A.4 Programming Flow Charts - Festo CPX Series Manual

A. Notes on commissioning and service
A.4 Programming flow charts
A.4.1 Create ready status
A−28
The following section provides flow charts for CMAX control
via I/O for typical applications.
Requirements
Valve operating voltage and load voltage OFF.
Fieldbus master is ready for communication, so communi
cation is established as soon as the CPX terminal is
switched on. If this is not the case, additional time must
be allowed for change of the byte order after establish
ment of communication.
Notes
All enabling bits (enable, stop, brake) can be set right
from the beginning and simultaneously. Correspondingly,
feedback can be evaluated simultaneously.
When exchanging components, the movement test is
reset automatically, if applicable. The movement test
status should therefore be checked before switching on
and the test be re−run automatically or user−guided, if
required.
Setting the operating mode should be done in a separate
module of the control at a central position. See also sec
tion A.4.4.
If the CMAX reports a faults, depending on this fault, not
all of the expected status signals can be indicated. Evalu
ation of SCON.ENABLED or SCON.OPEN, for example,
should then be aborted.
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH