Lenze DDS Function library Drive - Manual (Page 39)

Function library LenzeDrive.lib
Digital signal processing
2.3.1 Logical AND (L_AND)
2−29
L
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.