Aventics ECD-LV Betriebsanleitung Seite 22

AVENTICS | ECD-LV | R412025991–BAL–001–AC | English
Control with leak monitoring
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This operating mode is the same as the mode above but also measures the
system's leak rate and compares it to an adjustable limit [-L-]. If the actual leak
rate exceeds the limit more than twice in succession, control is deactivated
and the system switches to permanent suction.
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Setting for control with leak monitoring: [ctr = onS]
Activating the function [onS] activates [-L-] in the configuration menu.
Disabling control deactivation
(applies only to variant RD with integrated air economizer function)
Personal injury or property damage caused by moving objects
Disabling control deactivation [dCS = on] can lead to the suction valve being
controlled at a very high rate. This results in a risk of the ejector being destroyed!
O Make sure that no persons are in the transporting area when using control
deactivation.
O Do not disable control deactivation when switching frequently.
The automatic control deactivation can be disabled by the valve protection
function.
The automatic control deactivation can be disabled and enabled using the [dCS]
menu item in the configuration menu.
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[dCS = NO]: The ejector switches to the "Permanent suction" operating state
if the leak rate is too high and the valve switches too frequently.
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[dCS = YES]: Permanent suction is deactivated; the ejector continues regulating
despite the high leak rate or a control frequency of >6/3 s.
The setting [dCS = YES] is only available if the control function [ctr = on]
is selected.
In the event of undervoltage or a loss of voltage, the ejector variant NO
responds despite permanent suction being deactivated via [dCS = YES]
with permanent suction.
Blow-off modes
The menu item [bLo] in the configuration menu can be used to adjust two different
blow-off modes:
Externally controlled blowing off
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The "blow-off" valve is directly actuated via the "blow-off" signal input.
The ejector will blow-off as long as the signal is present.
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Blow-off setting for externally controlled blow-off: [-E-]
Internally time-controlled blowing off
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The "blow-off" valve is automatically actuated for the set time [tbL] (basic menu)
when exiting the "suction" operating state.
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This function saves an output on the controller.
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Blow-off setting for internally time-controlled blow-off: [I-t]
Signal output
The ejector features a signal output, which can be configured using the
corresponding menu item.
Output function
The signal output can be switched between the normally open contact [no] (normally
open) or the normally closed contact [nc] (normally closed).
The menu item [o-2] in the configuration menu is used to switch the output.
The function for the switching threshold H2-h2 (parts control) is assigned to the
signal output OUT 2.
Output type
The output type can be used to switch between PNP and NPN.
Furthermore, this function is also used to configure the signal inputs at the same
time.
The menu item [tYP] in the configuration menu is used to switch the output.
Selecting the vacuum unit
The menu item [uni] in the configuration menu can be used to select the unit
for the vacuum value displayed:
Bar
Vacuum values displayed in the unit mbar: [-bA]
Pascal
Vacuum values displayed in the unit kPA: [-PA]
inchHg
Vacuum values displayed in the unit inHG: [-iH]
WARNING
Write protection
A PIN code can be used to prevent the parameters from being changed in the user
menu. The display of the current settings is still guaranteed.
Upon delivery of the device, the PIN code is 000. This means that access to the
parameters is not locked. To activate write protection, you must enter a valid PIN
code between 001 and 999.
To permanently enable the display, you must set the PIN code to 000 again.
O Enter the PIN code into the configuration menu (menu item [PIN]).
As the state of signal inputs and outputs can change as a result of
configuration during active operation, we recommend using a PIN code.
Resetting to factory settings
With this function the ejector is returned to the settings on delivery.
The counter statuses are not affected by this function.
O Run the function using the configuration menu (menu item [rES]).
The factory settings for the ejector are listed at the end of these instructions
8
(table )
Resetting the device to its factory settings changes the switching points and
the configuration of the signal output. This may change the state of the
ejector system.
Counter
The ejector is equipped with two internal counters [cc1] and [cc2].
Symbol Function
Counter 1
Counter 2
The counters can be checked on the system menu.
Calculating the difference between counter 2 and counter 1 can provide information
regarding the average switching frequency of the air economizer.
Voltage monitoring
All ejector types are equipped with internal voltage monitoring. If the supply voltage
drops below the permitted threshold, the ejector switches to fault status E07. This is
shown on the display; menu operation and response to signal inputs is prohibited.
The parts control output functions as normal. The button
display the current supply voltage.
In terms of the pneumatics, the ejector's state changes as follows:
Ejector type NO
Ejector switches to the "Suction" operating state
Ejector type NC
Ejector switches to the "Pneumatics OFF" operating state
In the event of undervoltage and active suction, control is no longer active.
Furthermore, the system detects when the supply voltage is too high and generates
a corresponding error message.
Setting the blow-off volume flow
Below the vacuum connection there is a flow control screw for setting the blow-off
volume flow.
O Turn the flow control screw clockwise (to the right) in order to reduce the volume
flow.
O Turn the flow control screw counterclockwise (to the left) in order to increase the
volume flow.
The flow control screw has a stop on both sides.
Description
Counter for suction cycles
("Suction" signal input)
Counter for the "suction valve" switching
frequency
can still be used to
+
–
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