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Function library LenzeDrive.lib

Digital signal processing

2.3.1 Logical AND (L_AND)

2−29

LenzeDrive.lib EN 1.7

2.3 Digital signal processing

2.3.1 Logical AND (L_AND)

This FB implements the logical AND combination of binary signals. These operations can be used

for the control of functions or the generation of status information.

bIn1_b

bIn2_b

bOut_b

L_AND

bIn3_b

Fig. 2−32 Logical AND (L_AND)

VariableName DataType SignalType VariableType Note

bIn1_b Bool binary VAR_INPUT

bIn2_b Bool binary VAR_INPUT

bIn3_b Bool binary VAR_INPUT

bOut_b Bool binary VAR_OUTPUT

Truth table

bIn1_b bIn2_b bIn3_b bOut_b

0 0 0 0

1 0 0 0

0 1 0 0

1 1 0 0

0 0 1 0

1 0 1 0

0 1 1 0

1 1 1 1

0 = FALSE

1 = TRUE

The function corresponds to a series connection of normally−open contacts in a contactor control.

bIn1_b

bIn2_b

bIn3_b

bOut_b

Fig. 2−33 AND function as a series connection of normally−open contacts

Note!

Use the inputs bIn1_b and bIn2_b if you only need two inputs. Fix input bIn3_b to TRUE.

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Lenze DDS Function library Drive Bedienungsanleitung Seite 39