Schmalz SCPSi - Vacuum Monitoring; Control Function

7 General Description of Functions
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Manual suction
1. Press the UP button to activate “suction” on the ejector.
2. The DOWN or UP button exits “suction” mode again.
When the air saving function is switched on, it is also active in the “Manual Operation” operating mode.
Manual blow off
4 Press the DOWN button to activate “blow off” on the ejector for as long as the button is pressed.
ð The H1 and H2 LEDs light up simultaneously.
Deactivating the operating mode
4 By pressing the MENU button or through an external state change by signal inputs.
7.3.3Setup Mode
Setting mode is used for locating and eliminating leakages in the vacuum circuit. Since the valve protec-
tion function is deactivated and the control is not deactivated, even at increased control frequencies.
In this operating mode, the “H1” and “H2” LEDs both flash.
Setting Mode Activated and Deactivated
4 Set the corresponding value using bit 2 in the output process data byte (PDO).
A change to bit 0 or bit 1 (suction or blow off) in the PDO also causes the ejector to exit setting mode.
This function is only available in IO-Link mode.
7.4Vacuum Monitoring
The ejector has an integrated sensor for monitoring the current system vacuum. The vacuum level pro-
vides information about the process and has an effect on the following signals and parameters:
• The limit value H1
• The limit value H2
• The signal output H2
• The process data bit H1
• The process data bit H2
The limit values and associated hysteresis values are adjusted in the menu items x-1, h-1, x-2 and
h-2 in the main menu or via IO-Link.
7.5Control Function
The ejector allows you to conserve compressed air or prevent an excessive vacuum from being generated.
Vacuum generation is interrupted when the set vacuum limit value H1 is reached. If leakage causes the
vacuum to fall below the hysteresis limit value (H1-h1), vacuum generation resumes.
The operating modes for the control function can be set under the [ctr] menu item in the configuration
menu or via IO-Link.