VVP10 HART
HART
®
VALVE POSITIONER
INSTALLATION, OPERATION, CONFIGURATION AND MAINTENANCE MANUAL
______________________________________________________________________________________________________________________________
26
3.7.
CONTROL CONFIGURATION
VVP10 HART allows user to flexibly configure positioner control by changing magnet and sensor assembly
measurement modes, characterizing Setpoint, performing automatic calibrations and fine adjustments on PID control
parameters.
This section is intended for detailing each of these functions available to the user.
POSITION SENSOR
User can configure position measurement using the following parameters.
Magnet Type
It can be configured as Linear or Rotary, only for system information to the user.
Actuator Type
It can be configured as Single or Dual, indicating the actuator type of actuator, only for system information to the user.
For models with pressure sensors, this parameter will indicate which pressure to use in FST and PST diagnostics (see
section 3.9), being the pressure from output 1 (
POUT1
) for single action and the differential of output pressures
(
POUT2 - POUT1
) for double action.
NOTE
Parameters
Magnet Type
and
Actuator Type
are informative only, not influencing on PID control.
Air To Action
It
can be set to Open (100% Open) or Close (100% Closed), indicating the actuation of the actuator, according to the
action of the supply air in the positioner (depending on pneumatic connections installation).
Open:
the action of the air in the positioner (increase of PV%) causes actuator to open.
Close:
the action of the air in the positioner (increase of the PV%) causes actuator to close.
WARNING
For single action actuators (with spring force return), positioner’s output 1 (OUT1) should always be
used, in order to ensure the closure of the system by security in case of electrical failure.
SETPOINT
User can characterize Setpoint value through the following parameters.
Loop Current Mode
It can be set to Enabled or Disabled.
This parameter is available on the "HART" menu as it is a configuration common to all equipment that has this
communication protocol.
Enabled:
Setpoint will follow the 4-20 mA current of the positioner's power supply (in the percentage of the operation
range configured in
"Range"
menu), considering the user Setpoint settings (
Setpoint Mode, Setpoint Limits
and
Setpoint Cutoff
).
For example, considering the complete operation range 4 to 20 mA, Input Current = 8 mA (25% of current range) will
cause a 25% Setpoint.
Disabled:
Setpoint will follow the manual value configured by user in the
Local Setpoint
parameter, without considering
user Setpoint settings (
Setpoint Mode, Setpoint Limits
and
Setpoint Cutoff
).
