Description of Functions
EN-US · 30.30.01.01963 · 00 · 05/19
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The following operating modes can be set for the control function using the
[
ctr
]
parameter in the Ex-
tended Functions menu.
6.5.1 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
].
6.5.2 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
].
6.6 Blow off modes
You can choose between two blow off modes.
6.6.1 Externally Controlled Blow-Off
The “blow off” valve is controlled directly by the “blow off” command. 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.
6.6.2 Internally Time-Controlled Blow-Off
The function is activated by setting a blow off time using the [
tbl
] parameter in the main menu.
The “blow off” valve is automatically activated for the configured time period as soon as the ejector
leaves “suction” mode.
The “blow off” signal overrides the “suction” signal, even if the specified blow off time is very long.
6.6.3 Setting the blow off time
The blow off time can be set using the [
tbL
] parameter in the main menu.
The value displayed indicates the blow off time in seconds. The time can range from 0.01 to 9.99 seconds.
Set the time for time-controlled blow off (only active if value > 0). If you set the value to 0, the ejector is
automatically in “externally controlled blow off” mode.
6.7 Selecting the display unit
This function determines the unit in which the vacuum level is displayed.
You can set the function using the [
uni
] parameter in the EF menu.
The following units are available:
Unit
Explanation
bar
The vacuum level is displayed in mbar.
The setting for this unit is [
bAr
].
Pascal
The vacuum level is displayed in kPa.
The setting for this unit is [k
PA
].
Inch of Hg
The vacuum level is displayed in inHg.
