33 12 16.26 - 001-A - Response AAN-ANR Butterfly Valves - Garney ...

9.12 Bus System Positioning
Control Settings
OF
Display Bus System
Positioning Set-up Screens
FL
Bus System Valve
Position at 0% DV
FH
Bus System Valve
Position at 100% DV
58
If the system control strategy for
Pakscan, Modbus or Profibus requires
intermediate valve travel positioning,
certain control parameters need to be
checked: the Limited Range Position
Settings, the Motion Inhibit Time and
its Deadband. There are an additional
two ‘‘Action on Loss of Signal’’
parameters relating only to Modbus
and Profibus systems that also need to
be checked.
Limited Range Positioning is a selectable
option whereby positioning limits, 0%
and 100%, can be at different positions
to those used for digital Closed and
Open limit commands. Limited range
positioning can be set using the [FL]
and [FH] screens.
It should be noted that the actuator will
respond to a digital Open or Close host
command by moving the valve to the
set limits irrespective of settings made
for positioning control.
Settings for Deadband and Motion
Inhibit Time affect accuracy and
response time.
Bus system positioning control set-up
screens can be suppressed to provide
extra security.
Use the + or - key to turn on the
positioning set-up screens.
Bus System Positioning Control
Screens [On]
PRESS THE KEY.
The displayed option will flash
indicating that it has been set.
Press the ◗ key to display Bus System
Positioning Control Settings.
Once [FI] is displayed, press the ❖ key
to display [FL].
[FL] is the position to which the
actuator will move if a 0% command is
sent and is the position at which the
actuator will report 0% to the host.
The default setting is for 0% to be the
Close limit.
If altered, it is possible that the position
indicated by the actuator display will
differ to that indicated by the host.
Use the + or - key to select the desired
valve position for a 0% command.
0% DV = Valve Closed
PRESS THE KEY.
The displayed option will flash
indicating that it has been set.
Press the ❖ key to display [FH].
[FH] is the position to which the
actuator will move if a 100% command
is sent and is the position at which the
actuator will report 100% to the host.
The default setting is for 100% to be
the Open limit.
If altered, it is possible that the position
indicated by the actuator display will
differ to that indicated by the host.
Use the + or - key to select the desired
valve position for a 100% command.
100% DV = Valve Open
PRESS THE KEY.
The displayed option will flash
indicating that it has been set.
Press the ❖ key to display [Fd].