Aventics ECD-IV Notice D'instruction page 21

AVENTICS | ECD-IV | R412025990–BAL–001–AC | English
Deactivating "Manual operation"
Danger of injury due to moving objects
Automatic exiting of manual operation by changes to external signals can put a
handling object in motion by suctioning or blowing off.
O Make sure that no objects will be moved and no persons are in the
transporting area when you are exiting manual mode.
O Press the
button to exit the "Manual operation" mode.
The "Manual operation" mode is also exited by changing the status of the external
signal inputs.
Monitoring the system vacuum
Each ejector features an integrated sensor for monitoring the current system
vacuum. The vacuum level provides information about the process and influences
the following signals and parameters:
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Threshold value LED H1
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Threshold value LED H2
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Signal output H2
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Vacuum analog value
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Process data bits H1
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Process data bits H2
The threshold values and associated hysteresis values can be adjusted under the
menu options [H-1], [h-1], [H-2] and [h-2] in the home menu.
Zero-point adjustment for the Sensor (calibration)
We recommend calibrating the sensor after installing the ejector.
To adjust the zero-point of the vacuum sensor, the system's vacuum circuit must be
exhausted into the atmosphere.
The zero-point can only be adjusted in the range of ±3 % from the measuring
range's final value.
The error code [E03] appears in the display if the permitted limit of ±3 % is
exceeded.
The function for adjusting the zero-point of the sensor is executed using the [CAL]
menu items in the home menu.
Control function
This ejector function provides the opportunity to save compressed air. When the set
switching threshold H1 is reached, vacuum generation is interrupted. If the vacuum
drops below the hysteresis threshold H1-h1 due to leakage, vacuum generation is
resumed.
The following operating modes for the control function can be adjusted using the
[ctr] menu item in the configuration menu:
No control (permanent suction)
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Ejector suctions constantly with maximum output
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Recommended for very porous work pieces where the high leakage rate would
result in vacuum generation switching constantly off and back on again
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Setting for permanent suction: [ctr = oFF]
This setting ([ctr = oFF]) is only available when control deactivation is
disabled [dCS = oFF].
Control
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Ejector switches off vacuum generation when the threshold H1 is reached
and switches it back on again when the system falls below H1-h1 threshold.
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This setting is particularly recommended for suction-proof work pieces.
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Setting for control: [ctr = on]
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.
WARNING
Disabling control deactivation
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.
Automatic control deactivation can be deactivated and activated using the [dCS]
menu item in the configuration menu.
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[dCS = oFF]: 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 = on]: Permanent suction is deactivated; the ejector continues regulating
despite the high leak rate or a control frequency of >6/3 s.
The setting [dCS = on] is only available if the control function [ctr = on] or
[ctr = onS] is selected.
In the event of undervoltage or a loss of voltage, the ejector variant NO
responds despite permanent suction being deactivated via [dCS = on] with
permanent suction.
Blow-off modes
The menu item [bLo] in the configuration menu can be used to adjust three 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] 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]
The "Blow off" operating state can still be triggered by the "Blow off" signal
input, even in [I-t] mode.
Externally time-controlled blowing off
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The blow off pulse is actuated externally by the "Blow off" input.
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The "blow off" valve is actuated for the set time [tbL]. Increasing the input signal
does not increase the blow-off period.
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Blow-off setting for externally time-controlled blow off: [E-t]
The length of the blow-off time [tbL] is adjusted in the home menu.
This menu item is suppressed in the operating mode [-E-].
The number in the display indicates the blow-off time in seconds.
Blow-off times between 0.10 s to 9.99 s can be selected.
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
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