5 Diagnostics and fault clearance
72 Festo – MPAL-VI-EN – 2017-07a – English
5.5 Requirements for the operating statuses of the pneumatic system
Operating status Requirements Comments
No leakage – Tubing connected with care
– Regulated pilot air
–
Fast response Sufficient pressure supply via pres
sure supply modules
Valve terminal is exhausted through
all exhaust ports.
No malfunctions Check valves in common exhaust line This applies when several systems
with centrally ducted exhaust air are
used
2 or more pressure
zones
– Limitation of pressure zones with
separator plates with sealed
ducts
– Corresponding number of supply
modules to deliver pressure to
the different pressure zones
Retro-fitting is possible è Chap. 7.7
Vacuum or low-pres
sure operation
Externally supplied regulated pilot air
(3 … 8 bar)
Vacuum or low-pressure operation,
not with 3/2-way valves
Slow start-up If control signals are present,
the pilot air of 3 … 8 bar must be
present immediately after
switching on.
Externally supplied regulated
pilot air (3 ... 8 bar) is advisable
è Chap. 3.6.1
Tab. 5.5 Pneumatic operating statuses
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