Aventics ECD-IV, Operating Instructions Manual, Page: 20 / 31

Manual operation
In manual operation, the “Suction” and “Blow-off” ejector functions can be controlled
using the control panel buttons.
The two LEDs “H1” and “H2” flash in this operating mode.
Because the valve protection function is deactivated in manual operation, this
function can also be used to locate and repair leaks in the vacuum circuit.
Activating “Manual operation”
O
To activate “Manual operation” mode, simultaneously press and hold the and
buttons for > 3 s.
With the ECD-IV version [-M-] appears during actuation.
The current process status is retained when manual operation is first actuated.
„
Manual suctioning
O
To activate the “Suction” operating state in “Manual operation” mode, press the
button.
O
To exit the “Suction” operating state again, press the button or the button
once again.
Manual blow-off
O
To activate the “Blow-off” operating state in “Manual operation” mode,
press and hold the button
.
O
To exit the “Blow-off” operating state, release the button .
Deactivating “Manual operation”
O
Press the (ECD-IV) or the (ECD-LV) button to exit the “Manual operation”
mode.
The “Manual operation” mode is also exited by changing the status of the external
signal inputs.
WARNING
Personal injury or property damage due to moving machine/system parts
When setting up in manual operation mode, output signals may change and
external signals (coming from the PLC via the M12 plug) may end manual
operation, which will cause the machine/system to be put into motion.
O
Make sure that the machine/system is not put into motion and no persons are
in the transporting area when you are setting up manual operation.
O
Make sure that there are no control commands coming from the PLC during
manual operation, and putting the ejector into automatic mode as a result.
Dropping useful load due to lack of vacuum
Starting manual operation always results in the “pneumatics OFF” operating
state, i.e. active suctioning is interrupted by manual operation. Useful load may
therefore drop.
O
Make sure that no persons are located under the useful load in the
transporting area.
The “Manual operation” operating mode is also available without actuator
voltage
(emergency OFF, set-up operation in the IO-Link mode).
If the air economizer has been switched on (ECD-IV and ECD-LV-...-RD),
it will also be active in “Manual operation” mode.
This also applies when the actuator has no voltage.
For the ECD-LV the current vacuum value is displayed instead of the error
code
[E05] .
The valve protection function is not active in “Manual operation” mode.
This also applies when the actuator has no voltage. For the ECD-LV the
current vacuum value is displayed instead of the error code
[E05] .
WARNING
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.
Setup operation
Similar to manual operation, the setup operation is used to locate and repair leaks
in the vacuum circuit. The valve protection function is deactivated in the setup
operation and the control is also not deactivated with increased control frequency.
The two LEDs “H1” and “H2” flash in this operating mode.
The setup operation is switched on and off via the process data output (PDO).
The process bits suction and blow-off always have priority.
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:
W
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 are adjusted via the input
screen of IO-Link (line
[H-1] , [h-1] , [H-2] and [h-2] ).
Zero-point adjustment for the Sensor (calibration)
As the internally installed sensor is subject to manufacturing-related deviations,
we recommend calibration of the sensor once the ejector us installed.
To adjust the zero-point of the vacuum sensor, the system's vacuum circuit must be
exhausted into the atmosphere.
The function for adjusting the zero-point of the sensor is executed via the input
screen of IO-Link (line
[CAL] ).
Control function
(applies to ECD-IV and ECD-LV-...-RD)
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
input screen of IO-Link (line
[ctr] ):
No control (permanent suction)
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Ejector suctions constantly with maximum output
W
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]
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.
W
This setting is particularly recommended for suction-proof work pieces.
W
Setting for control: [ctr = on]
Control with leak monitoring
W
This operating mode is the same as the mode above but also measures the
system's leak rate and compares it to the 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.
W
Setting for control with leak monitoring: [ctr = onS]
This function is only available in the IO-Link operating mode.
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 this limit is
exceeded.
This setting ( [ctr = oFF] ) is only available when control deactivation is
disabled [dCS = oFF] .
Activating the function [onS] activates [-L-] in the configuration menu.
AVENTICS | ECD-IV/ECD-LV | R412026283–BAL–001–AA | English 15