Omega Engineering #M3350/0101 manual Changing Controller Mode and Using Autotune

7.Changing Controller Mode and Using Autotune

7.1Introduction

The CN8-SW system provides operators with an easy, reliable way of changing a controllerÕs mode without using the unitÕs front panel. This ability to change mode includes placing the controller in Autotune. Before putting a controller in Autotune, be sure to read the manual supplied with the controller. Autotune will not work correctly unless you prepare the process and the controller as described in the controller manuals.

7.2Procedure

To change a controllerÕs mode:

1.While logged in as MULTI (or another operator with View/Change Parameters privileges), select the controller by clicking on its image in the main graphic display. The border of the controller will be highlighted.

2.Select Controller Standby (or Manual or Tune). (If you attempt to put the controller into Autotune mode, a confirmation message will be displayed. Before using Autotune, you should read the manual supplied with the controller and comply with the Autotune guidelines provided in that manual. After you acknowledge the confirmation message, the Autotune command will be sent to the controller.)

3.The image of the controller on the main display will match the controllerÕs display in the new mode. For example, in Standby mode the PV value will alternate with the message ÒStbYÓ as shown in the following picture (see the ÒZone 4Ó controller).

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