Discharge Recycle Valve Screen; Discharge Recycle Valve Setpoints; Figure 9-4. Discharge Recycle Valve Screen - Emerson Vilter PLC Operation Manual

Section 9 • Step and PID Device Control Screens

Discharge Recycle Valve Screen

DISCHARGE RECYCLE VALVE SETPOINTS

• Target Recycle Control Pressure: Defi nes the pres-
sure at which the discharge recycle valve will begin
to open.
• Deadband: Range above and below setpoint where
the controller will not make adjustments to the re-
cycle valve position.
• PID Tuning: PID Calculations displayed to aid in tun-
ing the PID loop.
• Loop Update Time: Defi nes the PID controller loop
time. The PID calculation will update every cycle of
the loop update timer.
• Proportional Gain (Kp): Defi nes the Proportional
Constant of the PID calculation.
9 – 4

Figure 9-4. Discharge Recycle Valve Screen

Blower Package PLC Operation Manual •Vilter/Emerson • 35391BLP
• Discharge Recycle Valve Force: Allows the user to
manually force the discharge recycle valve to a set-
table position. Activating the Discharge Recycle
Valve Force pushbutton will command the discharge
recycle valve to go to the set position, and will over-
ride calculations from the PID Controller.