Festo VABF-S4-CB-VH Series, Инструкции и эксплуатация

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Fig. 4 Process quality
Legend Meaning
t
E
Evacuation time
t
LE
Leakage time
t
NS
Post-suction time
t
Trans
Transport time
t
B
Air supply time
Tab. 8 Legend for Process quality
4.10 Measured variables
Pressure value (vacuum)
The pressure value (vacuum) between the vacuum port and filter is continuously measured. The cur-
rent pressure value is transmitted via the input data. If the operating voltage of the vacuum generator
is switched off, these values are reset.
Cycle time
A cycle covers the time from the start of evacuation through ejection to the start of the new evacu-
ation.
Evacuation time and air supply time
The evacuation time t
E
is measured from the beginning of the evacuation until the switching point SP
A1
is reached. The air supply time t
B
is measured from the start of air supply to the time at which the pres-
sure value (vacuum) exceeds -5 kPa.
4.11 Teach-in function
With the teach-in function, the switching points and the monitoring functions can be configured during
operation.
Function
14 Festo — VABF-S4-...-CB-VH/VL-... — 2019-05