Functional Description

When the enable input (Ena) is turned on, the EPID output starts at the desired output start value (OSV) and changes slowly as needed to bring the controlled variable (Inp) to its setpoint (SPt). Start-up ramp time (SRT) controls the rate of change of the output during the start‑up period. Specifically, SRT is the minimum amount of time it takes for the output to go from the output start value to either 0 or 100 percent. The auxiliary input (Aux) is primarily intended for applications where EPID is used for high or low limit applications.

When the enable input is off, the EPID output is set to the OSV.