Schmalz SCPSi - Blow off Functions; Changing the Blow-Off Flow Rate on the Ejector

7 General Description of Functions
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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.
“Blow off” mode can still be activated in this mode using the “Blow
off” signal input.
The blow off signal overrides the suction signal, even if the specified
blow off time is very long.
The [L-t] function is not available for ejector variant IMP.
External 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.
The blow off signal overrides the suction signal, even if the specified
blow off time is very long.
The length of the blow off time [tbL] is set in the main menu. This menu item is suppressed in operating
mode [-E-].
The number displayed indicates the blow off time in seconds. Blow off times from 0.10seconds to
9.99seconds can be set.
7.7Changing the Blow-Off Flow Rate on the Ejector
Do not overwind past the stop on the valve screw. A minimum flow rate of approx. 10% is al-
ways necessary for technical reasons. The blow off volume flow can be set between 10% and
100%.
The figure shows the position of the valve screw
(1) for adjusting the blow off flow rate. The valve
screw is equipped with a stop on both sides.
• Rotate the valve screw (1) clockwise to reduce
the flow rate.
• Rotate the valve screw (1) counterclockwise to
increase the flow rate.
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1