Description of Functions
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EN-US · 30.30.01.01961 · 00 · 06/19
The following operating modes can be set for the controller function in the EF menu using the [
ctr
] pa-
rameter or via IO-Link.
8.4.1 No Control (Continuous Suction)
The ejector produces continuous suction with maximum power. This setting is recommended for very por-
ous workpieces, which would otherwise cause the vacuum generator to switch on and off continuously
due to the high rate of leakage.
For this mode, the control function is set to [
ctr
] = [
off
].
This setting can only be adjusted when the control shutoff is deactivated [
dC5
] = [
NO
].
8.4.2 Control
The ejector switches off vacuum generation when the switching point SP1 is reached and switches it back
on when the vacuum falls below the reset point rP1. The switching point evaluation for SP1 follows the
control function. This setting is particularly recommended for airtight workpieces.
For this mode, the control function is set to [
ctr
] = [
on
].
To protect the ejector, valve switching frequency monitoring is activated in this operating mode.
If the readjustment is too fast, the control function is deactivated and the device switches to continuous
suction.
8.4.3 Control with Leak Monitoring
This operating mode is the same as the previous mode, with the addition that the leakage rate within the
system is measured and compared to the configurable limit value for permissible leakage
-L-
.
If the actual leakage rate exceeds the limit value more than twice in succession, the control function is
then deactivated and the ejector switches to continuous suction.
In this mode, the control function is set to [
on5
].
8.4.4 Control Shutoff [P-0: 0x004E]
This function deactivates the automatic control shutoff.
The function can be set using the parameter [
dC5
] in the EF menu or via IO-Link.
Parameter
Setting value
Explanation
dc5
[
NO
]
If excessive leakage is detected and the valve is switching too often (> 6
times in 3 seconds), the ejector switches to “continuous suction” mode
[
ye5
]
Continuous suction is deactivated and the ejector continues controlling
in spite of the high leakage or having a switching frequency of > 6 times
in 3 seconds. Continuous suction will not be activated if the valve fre-
quency is exceeded.
When the control shutoff is deactivated, the suction valve makes frequent adjustments. This
can destroy the ejector.
8.5 Blow-Off Modes [0x0045]
The following three blow-off modes are available. The function can be set with the parameter [
bLo
] in
the extended functions menu or via IO-Link.
