Chapter 18 Process control instructions
530 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
HYSTER performs hysteresis on a Real value for a high limit.
Arguments
Parameter Parameter type Data type Description
EN Input BOOL Function block enable.
When EN = TRUE, execute function.
When EN = FALSE, do not execute function.
Applies only to LD programs.
XIN1 Input REAL Any real value.
XIN2 Input REAL To test if XIN1 has overpassed XIN2 + EPS.
EPS Input REAL Hysteresis value (must be greater than zero).
ENO Output BOOL Enable out.
Applies only to LD programs.
Q Output BOOL TRUE if XIN1 has overpassed XIN2 + EPS and is not yet below XIN2 - EPS.
Hyster timing diagram example
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