General Description of Functions
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EN-US · 30.30.01.01484 · 00 · 01/21
Operating mode
Explanation
No control/continuous suction, H1
in hysteresis mode
[
ctr
] => [
oFF
]
The ejector produces continuous suction with maximum
power. This setting is recommended for very porous
workpieces, which would otherwise cause vacuum gener-
ation to switch on and off continuously due to the high
rate of leakage. The limit value evaluation for H1 is oper-
ated in hysteresis mode.
Can be adjusted only if the control shutoff is deactivated
([
dC5
] => [
oFF
])
Control function activated
[
ctr
] => [
on
]
The ejector switches off vacuum generation when the
vacuum limit value H1 is reached. It switches it back on
when the vacuum falls below the hysteresis limit value
(H1-h1). The limit value evaluation for H1 follows the con-
trol function. To protect the ejector, valve switching fre-
quency monitoring is activated in this operating mode. If
the readjustment is too fast, the control function is deac-
tivated and the device switches to continuous suction.
Control function activated, leak-
age measurement activated
[
ctr
] => [
on5
]
Like the “Control function activated” operating mode; in
addition, the system leakage rate is measured and com-
pared to the adjustable leakage limit value [
-L-
]. If the
actual leakage rate exceeds the limit value more than
twice in succession, the control function is deactivated
and the ejector switches to continuous suction.
Available control function operating modes
The control shutoff function can deactivate the automatic control shutoff.
The function can be set under the [
dC5
] menu item in the configuration menu or via IO-Link. If the
[
dC5
=
oFF
] function is selected, the ejector switches to the “Continuous suction” operating mode
when there is excessively high leakage and the valve switches too frequently. With the [
dC5
=
on
] set-
ting, continuous suction is deactivated, and the ejector continues in control mode despite a high leakage
rate or control frequency greater than 6 times per 3 s.
In the event of undervoltage or a power failure, the NO ejector version reacts with continuous suction
even though continuous suction is deactivated with [
dC5
=
on
].
7.6 Blow off Functions
The ejector has three blow off functions in three different modes. The function is set under the [
blo
]
menu item in the configuration menu or via IO-Link.
Explanations of the blow off modes:
Description
Explanation
Externally controlled blow
off
[
bL0
] => [
-E-
]
The ejector switches to blow off mode for as long as the blow off signal
is present.
The blow off signal is given priority over the suction signal.
Internally time-controlled
blow off
[
bLo
] => [
l-t
]
After the suction signal is switched off, the ejector switches to blow off
mode automatically for the set time (which can be adjusted using
[
tbL
]). With this function, the blow off signal does not have to be ad-
ditionally controlled.
The blow off signal overrides the suction signal, even if the specified
blow off time is very long.
Externally time-controlled
blow off
[
bLo
] => [
E-t
]
The blow off starts with the blow off signal and is performed for the
set time period [
tbL
]. Applying the blow off signal for a longer time
does not lead to a longer blow off period.
