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Language Reference Arguments: XIN1 XIN2 EPS Q REAL REAL REAL BOO any real analog value to test if XIN1 has exceeded XIN2+EPS hysteresis value (must be greater than zero) TRUE if XIN1 has exceeded XIN2+EPS and is not yet below XIN2-EPS Description: Hysteresis on a real value for a high limit. Example of timing diagram: XIN2+EPS XIN2 XIN2-EPS XIN1 Q LIM_ALRM lim_alrm H X L EPS Arguments: H X L EPS QH Q QL REAL REAL REAL REAL BOO BOO BOO QH Q QL high limit value input: any real analog value low limit value hysteresis value (must be greater than zero) "high" alarm: TRUE if X above high limit H alarm output: TRUE if X out of limits "low" alarm: TRUE if X below low limit L Description: Hysteresis on a real value for high and low limits. An hysteresis is applied on high and low limits. The hysteresis delta used for either high or low limit is one half of the EPS parameter. Below is an example of timing diagram: ICS Triplex ISaGRAF Inc. B-279
