Description of Functions
EN-US · 30.30.01.01961 · 00 · 06/19
29 / 68
8.2 Monitoring the System Vacuum and Defining Limit Values
The ejector has integrated sensors for measuring the vacuum.
The current vacuum and pressure levels are shown on the display and can be read out via IO-Link.
The limit values are set in the main menu using the parameters [
5P1
], [
rP1
], [
5P2
] and [
rP2
] or IO-
Link.
Limit values SP1 and rP1 are used by the control function to control the vacuum.
Limit value SP3, “Part deposited” [PDIN0] cannot be set using the main menu. It is fixed at 20 mbar. Signal
SP3 is issued when the vacuum reaches < 20 mbar (providing the vacuum has already reached SP2 once).
By issuing this signal, the ejector tells the control system that the part has been deposited successfully. The
signal is reset by issuing a new Suction ON command.
Overview of the limit values:
ISDU [Hex]
Limit value parameter
Description
P-0: 0x0064
SP1
Vacuum control value
Vacuum switching point
P-0: 0x0065
rP1
Vacuum hysteresis
Vacuum reset point
P-0: 0x0066
SP2
Activation value of “Parts control” signal output
P-0: 0x0067
rP2
Deactivation value of “Parts control” signal out-
put
—
SP3
Part deposited (vacuum < 20 mbar)
8.3 Calibrating the Vacuum Sensor [0x0002]
Since the sensor integrated in the ejector is subject to variation due to the manufacturing process, we rec-
ommend calibrating the sensor after installation. In order to calibrate the ejector, the system’s pneumatic
circuits must be open to the atmosphere.
A zero offset is only possible in the range of ±3 percent of the end value of the measuring range.
If the permissible limit of ±3% is exceeded, error code [
E03
] will appear on the display.
The function for zero-point adjustment of the sensor is performed in the basic menu under the parameter
CAL
or using IO-Link.
Calibrating from the Main Menu:
1. To adjust the zero point, press the
button several times until [
CAL
] appears on the display.
2. Confirm using the
button.
3. Use the
button to choose between [
No
] and [
YE5
] (calibrate the vacuum sensor).
4. Confirm using the
button.
ð
The sensor is calibrated.
8.4 Control Functions [P-0: 0x0044]
The ejector allows you to conserve compressed air or prevent a too powerful vacuum from being gener-
ated. Vacuum generation is interrupted once the configured switching point SP1 is reached. If leakage
causes the vacuum to fall below the reset point rP1, vacuum generation resumes.
The
permitted leakage
can be set in mbar/s using the [
-L-
] parameter in the Extended Functions menu.
The leakage is measured from the point when the control function interrupts suction after reaching
switching point SP1.
