Menu option Contents Condition
"Tune pres decr" E.g.5600 "Tuning pressure decrease" appears only if "Para-
meter set" = "Custom".
Setting of the tuning parameter for pressure jumps
downwards.
"Exit"
– –
Tab. 8 "Parameters"
Parameter Set "Custom"
If the parameter set "Custom" is selected, brief pressure rises up to the input pressure are possible at
the working port. This is independent of any set limit values ("Pressure min"/"Pressure max") During
the regulation process and during homing, the complete input pressure or the vacuum present at the
exhaust port can be present at the working port.
If the application and the tuning parameters do not match, an uncontrolled response is possible (con-
tinuous oscillation, continuous maximum or minimum pressure at the working port). If the application
is changed, the tuning parameters must be adjusted.
The parameter set "Custom" permits individual adjustment/optimisation of the control response for
an application. This adjustment permits greater pressure dynamics in the face of a constriction than a
standard controller can. This considerably reduces settling times for pressure jumps. The two required
model parameters ("Tuning increase"/"Tuning decrease") can be determined automatically via hom-
ing. The determined model parameters can also be adjusted manually afterwards. Free entry of these
two model parameters without homing is also possible.
Commissioning
17Festo — VPPI-...-D — 2019-12
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