VAC D500, Manual

Page: 42 / 89

42
… 9 Operation
Switching the operating mode
The operating mode is displayed and changed in the operating
modes menu.
Additionally, it is possible to switch to the configuration level
from there.
Process display
1. Use to switch to the Operating Mode menu.
Operating mode
Auto Adjust
O Adaptive
O Control
O Manual SP
O Manual Sensor
Configuration
Back OK
2. Use or to select the required operating mode.
3. Confirm the selection with .
Description of operating modes
Symbol Operating mode
Adaptive control active
When the PositionMaster EDP300 positioner is operated
in ‘Adaptive Mode’, the control parameters are
automatically optimized to the operating conditions in
small increments. This is especially helpful if valves and
fittings could not be operated with reference conditions
while the Auto Adjust function was in progress.
The long-term stability of the adaptive operating mode
results more from the system structure than from the
changing behavior of the system, meaning that if a
stable, adaptive operating mode can be obtained over
several days of control variations in the system
application with positioner, actuator, valve and changes
in behavior, we can assume stable operation in the
application mentioned above.
If that is not the case, the ‘Non-adaptive control’ option
should be selected.
Fixed control
In contrast to the ‘Adaptive control’ operating mode, the
control parameters are not automatically adjusted.
Manual set point, adaptive control
The valve is adjusted manually within the stroke range
using
the or direction buttons.
1. .Press and hold the relevant operating button for the
desired direction.
2. .Additionally, press if the device is to be switched
to high-speed mode.
CAUTION
Danger of crushing!
Configured stroke limit positions and stroke times
are not effective in manual mode. When the actuator
moves, there is a risk of crushing.
• You must make sure that there are no people
present within the operating range of the
actuator.