FB_AND

Description Function Block

Using the FB_AND function block, several input signals can be linked via AND to make an output signal. In addition, each input can have a setting as to whether or not it should be negated. This can be switched using the Negation command from the context menu.

The bAndIn1 input differs from the bAndIn2 – bAndIn8 inputs insofar that it can also be connected to a standard input. This makes it possible to switch off a safe output via standard signals. Outputs cannot be switched on via standard signals, but only enabled, because at least two inputs of FB_AND must always be linked (and the second input is a safe input which prevents switching on).

Table 4. VAR_INPUT

Name	Data Type	Initial Value	Description, Parameter Values
`bAndIn1`	`BOOL`	`FALSE`	1st input channel
`bAndIn2`	`SAFEBOOL`	`FALSE`	2nd input channel
`bAndIn3`	`SAFEBOOL`	`FALSE`	3rd input channel
`bAndIn4`	`SAFEBOOL`	`FALSE`	4th input channel
`bAndIn5`	`SAFEBOOL`	`FALSE`	5th input channel
`bAndIn6`	`SAFEBOOL`	`FALSE`	6th input channel
`bAndIn7`	`SAFEBOOL`	`FALSE`	7th input channel
`bAndIn8`	`SAFEBOOL`	`FALSE`	8th input channel

Table 5. VAR_OUTPUT

Name	Data Type	Initial Value	Description, Parameter Values
`bAndOut`	`SAFEBOOL`	`FALSE`	Output channel