Festo Контроллер позиционирования CPX-CMAX - Manual (Page 58)

2. Fitting and pneumatic installation
2−28
Festo P.BE−CPX−CMA X−SYS−EN en 0908NH
Instructions on converting systems
When converting systems you should still use the existing
drives. Often, only drives with a unilateral air connection are
available here and the cushioning path (PPV) is used as the
drive stroke.
In some cases the specified positioning times cannot be fully
achieved.
The specified positioning times and optimum system
behaviour can only be achieved if the installation instructions
described in the previous section are observed.
Drives with unilateral compressed air supply
Please observe the following when using drives with unilatĆ
eral air supply connections:
ć A unilateral air supply connection may only be used with
cylinders or drives with a stroke length
Ţ 600 mm.
ć If compressed air is applied to port 4 of the proportional
directional control valve then the drive must move in a
negative direction. If compressed air is applied to port 2
then the drive must move in a positive direction. In some
cases, arrows on the drive indicate the direction of moĆ
tion.
ć The resulting positioning times may vary according to the
direction of the stroke.