AND Logic Operation
As long as the “logical input object” has the value “1”, switching can be carried out as usual using the address of the “switch object”. Set staircase lighting times will continue to be observed. Switching off via the “logic object” takes effect immediately.
|
Object Logical input |
Object Switching |
Result |
|---|---|---|
|
0 |
0 |
0 |
|
0 |
1 |
0 |
|
1 |
0 |
0 |
|
1 |
1 |
1 |
Example:
An AND logic operation can be used to create a power-on lock. This means that as long as the value of the “logic object” is “0”, the “switch object” cannot be used for switching on. If the value of the “switch object” is “1”, switching on is carried out automatically if the value of the logic object changes from 0 to 1.
AND logic operation;
Value of logic object
after bus voltage recovery: 1
The logic object is preset with the value "1" after a RESET (bus voltage recovery and download). This enables switching to be carried out as usual using the switch object. The power-on lock is not active until a "0" telegram has been received via the logic object.
AND logic operation;
Value of logic object
after bus voltage recovery: 0
The parameter setting causes the "logic object" to be set to the value "0". After a RESET, the actuator does not switch the output until a "1" telegram has been received on the "logic object".