Honeywell EXCEL 5000 User Manual

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Honeywell EXCEL 5000 User Manual Manual pdf 89 page image

EXCEL CARE CONTROL ICONS ALPHABETIC REFERENCE91 74-5577–33 (US)EN2B-0184 GE51 R0518 (Europe)UP-DOWN RAMPFunction As an input varies between a minimum value and a maximum value, vary an outputon a time-delayed basis.I/O Dialog BoxInputs Max = output maximum (input or parameter)Inp = Input to be rampedMin = output minimum (input or parameter)Minimum and maximum input values impose limits on the output value.Outputs Out = ramped outputSeparate up and down ramp time parameters are provided in the internalparameters dialog box.On controller power-up, the output is set based on Parameter 3:P3=0 output set to minimum limitP3=1 output set to current input (within min-max limits)P3=2 output set to maximum limitP3=3 output set to value of Parameter 4 (within limits)The rate of change of the output is a function of the span between the Min value, theMax value, and the up and down ramp times. Subtract the Min value from the Maxvalue and divide the result by the appropriate ramp time to determine the rate ofchange. To select a particular rate of change, first establish the desired Min andMax limits, then divide the difference between these two limits by the desired rate ofchange to get the up or down ramp parameter values.Internal Parameters