PLC Programming

The Util.lib library
RAMP_REAL
RAMP_REAL functions in the same way as RAMP_INT, with the simple difference that the inputs IN,
ASCEND, DESCEND and the output OUT are of the type REAL.
10.17.7 Analog Value Processing...
HYSTERESIS
The input to this function block consists of three INT values IN, HIGH and LOW. The output OUT is of
the type BOOL.
If IN goes below the limiting value LOW, OUT becomes TRUE. If IN goes over the upper limit HIGH,
FALSE is delivered.
An illustrative example:
LIMITALARM
This function block specifies, whether the input value is within a set range and which limits it has
violated if it has done so.
The input values IN, HIGH and LOW are each of the type INT, while the outputs O, U and IL are of the
type BOOL.
10-58 CoDeSys V2.3