Technical Specifications

231
Position Fault Limits
Configure
Position Fault Limits
You can configure how position errors are handled. A position error occurs when the valve
position differs from the requested position (from the input signal in normal operating mode
or the manual setpoint in manual mode) by more than the parameters. When this occurs, a
status flag is set which is reported during the next HART message only that a flag is set is
reported.
On the Configure tab you can set:
Position Error Band Use this to define the error band, or the percentage of valve travel,
that the requested position is allowed to vary from the actual posi-
tion. The Position Error Band must be between 0.5% and 200%. If
you set a value for Position Error Band outside the range an error
message appears.
Figure 32 Position Error Band Error Message
Time 1 s Enable Use check box to enable a field to enter the amount of time a posi-
tion error is allowed to exist before the valve is put in failsafe posi-
tion. This time must be between 1 and 327 seconds. If you set a
value for Position Error Time outside the range an error message
appears.
Figure 33 Position Error Time Error Message