Satec Expertmeter PM180, Reference Manual

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2.3 Built-in functions
Functions are a type of Program Organization Unit. They are small
reusable units that form the fundamental building blocks of complex
industrial control programs. The implementation contains several built-
in functions that are supported by PM180 devices. They are listed in the
table below.
Function
abbreviation Function name Inputs
data
type Outputs
data type
Logical operations
AND AND ANY_BIT ANY_BIT
OR OR ANY_BIT ANY_BIT
NOT NOT ANY_BIT ANY_BIT
GE_THRESHOLD Greater or equal with threshold LREAL BOOL
LE_THRESHOLD Less or equal with threshold LREAL BOOL
GE Greater or equal ANY BOOL
EQ Equal ANY BOOL
LE Less or equal ANY BOOL
Time delays
TON Timer ON BOOL,
Time BOOL
TOF Timer OFF BOOL,
Time BOOL
2.3.1 AND
AND function returns result of all inputs using logical conjunction.
Number of inputs is not limited.
AND function is shown in the figure below.
Figure 1 - AND
2.3.2 OR
OR function returns result of all inputs using logical disjunction. Number
of inputs is not limited.
OR function is shown in the figure below.
Figure 2 - OR
2.3.3 NOT
NOT function returns result of one input using logical inversion.
NOT function is shown in the figure below.