ALPHABETIC REFERENCE EXCEL CARE CONTROL ICONS74-5577–33 (US) 128EN2B-0184 GE51 R0518 (Europe)Connection of the MAT Icon to a Control Icon1. Click on the icon in the Control strategy work space to which the MAT iconshould connect.RESULT: The dialog box for the icon displays.2. Click the analog input into which the MAT icon should connect.RESULT: A check mark appears in the check box.3. Select the MAT icon in the Control strategy work space.RESULT: The MAT dialog box displays.4. Click the Y check box to select the output.RESULT: A check mark appears in the check box.5. Click the red icon symbol in the icon dialog box on the left.RESULT: Both dialog boxes close. Both icons turn dark blue.6. Complete the connection between both icons in the usual way.RESULT: The MAT control strategy icon turns light blue. The other icon alsoturns light blue if all input/output connections are done.Differential Function (DIFT) Dialog BoxIn Excel Web / Excel Web II replaced by the function “Differential”.Purpose Calculate a differential output signal that varies proportionally to change in the inputsignal.Formula DIFT= Td/t0*[x(t)-x(t-t0)]Where:Td is the proportional constant.x is a user address representing the deviation.x(t) is the actual value of user address x.x(t-t0) is the value of the user address x in the previous cycle.User address x can be a physical point, pseudopoint, or flag.Procedure 1. Click DIFT.RESULT: The differential function dialog box displays.2. Select a user address for the x: value (function variable). Use one of thefollowing methods:• Select a user address from the physical point bar in the Control strategyor Switching logic window.
