Festo CPV -VI Series Manual page 86

4. Commissioning
4−4
Warning
If the build−up in pressure of the auxiliary pilot air is too
slow or delayed, this may cause the actuators to perform
sudden unexpected movements.
Switch on the compressed air with a safety start−up
valve (slow build up of pressure) and
When there are electric signals (e.g. after EMERGENCY
STOP).
This can cause damage to the machine or system and even
injury to human beings.
Supply the auxiliary pilot air via the left−hand end plate
·
(3...8 bar).
The auxiliary pilot air must reach a pressure of 3...8 bar as
soon as it is switched on, otherwise the valve cannot be guar
anteed to switch (see diagram).
If the pressure is less than 3 bar, there may be a delay before
the valve is switched, in spite of an electric signal being pres
ent. The slow increase in pressure of the complete supply
does not then affect the cylinder. Depending on the valve
function, the cylinder would extend or retract suddenly.
Festo P.BE−CPV−EN en 0503g