4 Supplement
30
4.2.6 Limit value monitoring
The following representations show the function of limit value (AL, AL2) for the various alarm
functions AF1 to AF8. The hysteresis (HySt) is always symmetrical in relation to the limit value.
Limit value referring to setpoint w
Fixed limit value
4.2.7 Self-optimization (TUNE)
Self-optimization operates according to the oscillation method and determines the optimum pa-
rameters for a PID or PI controller.
The following parameters are optimized depending on the controller type configured (2-state, 3-
state, continuous controller) and the controller structure (parameterization):
Proportional band (Pb1, Pb2), derivative time (dt), reset time (rt), cycle time (Cy1, Cy2), filter time
constant (dF; parameter of the analog input).
AF1 symmetric AF2 symmetric
AF1 asymmetric AF2 asymmetric
AF3 AF4
AF5 AF6
AF7 AF8
To Next Page
Loading...
Need help?
General
