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| Proportional Integrative and Derivative Control This function executes the proportional, derivative and integral function based on the process variable to determine the control output. | InputsIn 1 = process variable (analog)OutputsOut 1 = control output (analog) |
| High alarm block. Compares the In 1 with a set value X.If (In1) > X then (Out1) = 1If(In1) < X then (Out1) = 0 | InputsIn 1 = value to be evaluated (analog) OutputsOut 1 = result of the comparison (discrete) |
| Low alarm block. Compares the In 1 with a set value X.If (In1) < X then (Out1) = 1If (In1) > X then (Out1) = 0 | InputsIn 1 = value to be evaluated (analog) OutputsOut 1 = result of the comparison (discrete) |
Diagram | Description | I/O |
| High Highalarm block. Compares the In 1 with a set value X.If (In1) > X then (Out1) = 1If (In1) < X then (Out1) = 0 | InputsIn 1 = value to be evaluated (analog) OutputsOut 1 = result of the comparison (discrete) |
| Low Low alarm block. Compares the In 1 with a set value X.If (In1) < X then (Out1) = 1If (In1) > X then (Out1) = 0 | InputsIn 1 = value to be evaluated (analog) OutputsOut 1 =result of the comparison (discrete) |
| Totalizer blockPerforms the totalization of a variable rate entered and compare this totalization (Q) with a set value (X).If Q > X then (Out1) = 1If Q < X then (Out1) = 0 | InputsIn 1 = value to be totalized (analog) In 2 = totalizer reset (discrete)OutputsOut 1 = result of the comparison (discrete) |
Diagram | Description | I/O || Real Time Clock blockThis function has a real time clock with the actual time of the day. It compares the actual time (T) with a set time (X).If T = X then (Out 1) = 1If T ≠ X then (Out 1) = 0 | InputsThis function has no input OutputsOut 1 = result of the comparison (discrete) |
| Time ON Delay blockThis timer generates a delay on the transition from OFF to ON on the output signalregarding the input signal.(Out 1) will be ON, X seconds after In 1 changes to ON.(Out 1 will be OFF immediately In 1 changes to OFF | InputsIn 1 = value to be delayed (discrete) OutputsOut 1 = delayed signal (discrete) |
| Time OFF Delay blockThis timer generates a delay on the transition from ON to OFF on the output signal regarding the input signal.(Out 1 will be ON immediately In 1 changes toON(Out 1) will be OFF, X seconds after In 1 changes to OFF. | InputsIn 1 = value to be delayed (discrete) OutputsOut 1 = delayed signal (discrete) |
Diagram | Description | I/O |
| Addition blockThis block performs the arithmetical addition of the input signals.(Out 1) = (In 1) + (In 2) + (In3) | InputsIn 1 = value to be added. (analog)In 2 = value to be added. (analog)In 3 = value to be added.(analog)OutputsOut 1 = added value (analog) |
| Recorder blockThis block samples all the input values on a predetermined frequency and stores them for trending or further access. Data values and time stamps are stored. | InputsIn 1 = value to be recorded. (analog or discrete)In 2 = value to be recorded. (analog or discrete)In 3 = value to be recorded. (analog or discrete)OutputsThisblock has no output |
Diagram | Description | I/O |
| Analog Connection LineThis line is used to connect any analog output to any analog input in order to communicate the value from one block to the other. | InputIn 1 = the value to be transmitted (analog)OutputOut 1 = same as In 1 |
| Discrete Connection LineThis line is used to connect any discrete output to any discrete input in orderto communicate the value from one block to the other. | InputIn 1 = the value to be transmitted (discrete)OutputOut 1 = same as In 1 |
| Out Cross Reference blockThis cross reference is used to link one logic segment to other logic segment. It is important to use a precise and unique tag or description. The Out cross references should have an In Cross reference to establish the...
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