4. Commissioning
4-22
Festo P .BE-MPA-EN en 1108e
4.7.2 Operating states of the pneumatic system
The following conditions should be fulfilled, in order that the
desired pneumatic operating states listed below can be
achieved:
Desired
pneumatic
operating status
Prerequisites Comment
Zero-leakage – Tubing connected with care
– Regulated pilot air supply
—
Fast reaction Sufficient pressure supply b y means
of pressure supply modules
Exhaust the MPA-S valve terminal via
all exhaust plates or flat plate
silencer
Trouble-free Non-return valves in common
exhaust line
This applies when several systems
with centrally ducted exhaust are
used
Two or more
pressure zones
– Limiting the pressure zones by
means of isolating seals with
blocked channels
– Appropriate number of pneumatic
air supply plates for supplying the
different pressure zones.
Subsequent conversion possible
(see Chapter 5)
Vacuum or
low-pressure
operation
Externally supplied regulated pilot
air supply ( 3 … 8 bar)
Vacuum/Low pressure operation not
with 2x2/2- and 2x3/2-way valves
(Ident.codeD,I,H,K,N)
EMERGENCY STOP of
pressure zones
Guaranteeing the c ontroller function
for the pilot a ir supply despite the
overall supply being switched off
The controller regulates the pilot air
supply to all the valve plates on an
MPA-S valve terminal
Slow star t-up after
EMERGENCY STOP
If control signals are present, the
pilot air supply must have a pressure
of 3 ... 8 bar immediately after being
switched on
Tab. 4/11: Pneumatic operating states
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