KFU 2-/4-
181
The setting of the percentage limits of the comparators enables the following logical
links. The comparison with signs is possible in the corresponding operation modes of
the comparators.
1
on
above
0
off
below
%
1
on
above
0
off
below
%
Output signals
Digital signals indicate the result of the comparison.
Comparator 1
171 - Output Comparator 1
1)
20 - Comparator 1
2)
The comparison – selected via
Op. Mode Com-
parator 1
540
– is true.
172 - Negated Output Com-
parator 1
1)
The comparison – selected via
Op. Mode Com-
parator 1
540
– is true. The output level of the
comparator is inverted.
Comparator 2
173 - Output Comparator 2
1)
21 - Comparator 2
2)
The comparison – selected via
Op. Mode Com-
parator 2
543
– is true.
174 - Negated Output Com-
parator 2
1)
The comparison – selected via
Op. Mode Com-
parator 2
543
– is true. The output level of the
comparator is inverted.
1)
For linking with inverter functions
2)
For digital output
14.5.3 Function
table
The function table allows to link external digital signals and internal logic signals of
the frequency inverter with each other. Besides standard AND, OR and XOR combi-
nations, different more advanced logic functions like RS Flip Flop are available. The
corresponding output value can be used for further logic instructions and digital out-
puts. The logic instructions can be linked with each other for any complex intercon-
nections.
Up to 32 logic instructions allow flexible adoption of various input signals.
Example:
A drive should start when:
the enable signal AND the S5IND signal are set
OR
the enable signal AND the S6IND signal are set.
Refer to the application manual “Function table” for a more detailed description.
