Operating Status Of The Pneumatic System - Festo CDVI-DN Description

4. Commissioning

4.4.2 Operating status of the pneumatic system

Desired pneumatic
operating status
zero-leakage
fast reaction
trouble-free
Several pressure zones
Vacuum operation / low
pressure operation
EMERGENCY STOP of
pressure zones
Slow start-up pressu-
rization after EMERGENCY
STOP
Tab. 4/6: Pneumatic operating states
4-12
If the operating status of the pneumatic system deviates from
the desired pneumatic operating status, the following
conditions are probably not fulfilled:
Requirement
–
Tubing connected with care
–
Regulated external pilot air
(3 ... 8 bar).
sufficient pressure supply
Non-return valves in common
exhaust tubing
Limiting the pressure zones on
both sides by means of separator
plates
Separately supplied regulated
pilot air (3 ... 8 bar)
Guaranteeing the controller
function for the pilot air supply
despite the overall supply being
switched off
–
Using the right-hand end plate
for external pilot air supply
–
Re-pressurizing the CDVI via
the soft-start valve
Remarks
CDVI with one pressure zone:
Supply or remove compressed air
and exhaust air via the left and
right-hand end plate.
This applies when several systems
with centrally ducted exhaust are
used
Subsequent conversion possible
(see chapter 5)
–
Vacuum operation not possible
with 2 x 3/2-way valves
–
External regulator can only
be operated with pressure
(, 3 bar)
The controller regulates the pilot
air supply of all the valves on the
CDVI
If electrical control signals are
present, the pilot air supply
must have a pressure of 3 ... 8 bar
immediately after switching on.
Festo P.BE-CDVI-EN en 1202e