DataFlo-C Smart Controller

PID Controller With Auto Tune 
INSIDE The Final Control Element

Go to DataFlo-P Positioner
The DataFlo-C is a fresh approach to PI D control. This combi- nation microcontroller based PID single loop controller and final control element brings control to the point of use. The rugged compact package simplifies wiring requirements by directly accepting RTD, analog or thermocouple inputs. The signal does not have to be conditioned, improving reliability. All the parameters are easily programmed through the local keypad or via a simple RS-485 computer interface. The control valve/PID controller is easily tuned to the loop with the built-in Auto Tune program (excluding level control).


  • Rugged valve and actuator package with integral PID control
  • Autotuning of PID algorithm
  • Total control of process parameters either locally or via RS485 computer network
  • Closed loop control
  • Easy push button calibration of the controller
  • Embedded microcontroller
  • Adjustable filter
  • Programmable direct/reverse acting
  • Programmable dead band and operating parameters
  • Electronic Travel Limits
  • Two process signal inputs (RTD only)
  • Single source, valve, actuator, controller

PLC Interface/Manual Valve Control

 

 Enables the user to take the controller off line and operate in a manual positioning mode. The user can switch between PID control and a linear positioning mode by a discrete 24 VDC output from the PLC. An operator can also change setpoint input via an analog input to the controller. 

Why Install The PID Controller 
In The Final Control Element?

  • Reduces lag time between the measuring element, controller and control valve.

  • Increases process efficiency through faster valve response.

  • Quicker process start up.

  • Microcontroller function allows for greater resolution and more variables to customize the valve to the process.

  • Setpoint control either locally at the valve or from a PLC.

  • Inexpensive to install, less wiring.

  • Cost approximately the same as the traditional valve, actuator and positioner. 

AutoTune Made Simple

  • Worcester Controls has incorporated a simple to use, highly effective auto tune algorithm within the microcontroller of the DataFto-C. Using the time proven method of tuning commonly referred to as the Ziegler/Nichols Curve, Worcester has been able to make the tuning of a loop as simple as pushing a button.

  • The operator can control valve position during the tuning function so as not to create major process upsets.

  • The controller will output "real time" tuning information, via the RS485 interface, that will allow the operator to monitor the process and the controller output during tuning.

  • The program is designed to allow the operator to quickly get the controller on line with minimum difficulty and limited loop tuning experience.

More Info

 

© Pneumatic Control, Inc. 1999/2000