UAP1074 - USC Application

1. When power is applied to the module the output is set to 4mA and the dosing is stoped.
2. The operator must press 'ENTER' on the access module then 'CONSTANTS' and enter the required 'FlowRate' between 0 and 6, decimal input is used. The access module will accept values out of range however values greater than 6 will be treated as 6 and values below 0 will be treated as 0.
3. The 'DosTime' is then entered between 0 and 120, any decimal portion of the number entered is ignored. The access module will accept values out of range however values greater than 120 will be treated as 120 and values below 0 will be treated as 0.
4. After the flow rate and dosing time have been entered, start is pressed. Relay 2 will close during the dosing cycle. The USC701 will control the flow at the entered rate output until the dosing time has expired or stop is pressed. Changing 'FlowRate' and 'DosTime' while in run mode will have no effect on the currently running dose, to make new values take effect press stop and start again.
5. To display the status of a dosing sycle use the hot keys as shown below.

Hot Key	Description
UP	Display flow (CH1)
DOWN	Display timer, negative number when stoped otherwise displays remaining time.
BACK	Display set point to control to.
NEXT	Out% indicates the angle of the control valve.
ENTER	Goes to trim menu to adjust required flow rate and Trim menu.

 

Refer to drawing "MA70317, Using The USC701 PID Wizard" listed under COA703 for tuning instructions.

 

Issue	Comment
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a	uap1074a.usc = USC application program. uap1074a.pdf = printable copy of application with comments on program listing.