Process Displays
Stage
Revision 9
900 Control Station User Guide
101
May 2014
Stage
The Stage function block provides differential On/Off control and is typically used to monitor pressure and
flow for controlling pumps and operating valves.
There are four individual stages grouped together in the function block. The block monitors from one to
two analog inputs (PV1, PV2) which are common to all four stages, compares them for each stage by a
configurable comparator, and provides On/Off control outputs for the four stages based on configurable
setpoints for each stage. Each stage can be individually enabled and forced ON or OFF.
Item
Description
PV1
PV1 input pin of the function block (pressure)
PV2
PV2 input pin of the function block (flow)
Status
Enabled = stage is enabled. Disabled = stage output is off. This condition
overrides the Override status. When Status = Enabled the stage algorithm
is reevaluated to determine the state of Output (request).
Output
Output of the stage. Off, On, or Disabled.
Override
Override On input pins and Override Off input pins of the function block.
None, On, or Off.