Limiter
This function block limits the range of the input signal INP to a defined minimum and maximum.
If the value INP is within the given range, it will be set to the output OUT. If the input exceeds the maximum, only the maximum will be set to the output OUT and the signal Qo will set to HIGH. If INP falls below the minimum, only the minimum will set to the output OUT and the signal Qu will set to HIGH.
If the value of MIN is greater than MAX, the value of MAX will be send to the output OUT and both outputs Qu and Qo will set to HIGH.
Operation
| Condition | Qu | Qo | OUT |
|---|---|---|---|
| INP <= MIN | 1 | 0 | MIN |
| MIN < INP < MAX | 0 | 0 | INP |
| MAX <= INP | 0 | 1 | MAX |
| MAX < MIN | 1 | 1 | MAX |
Characteristic:
Signals
| Name | I/O | Type(s) | Function |
|---|---|---|---|
| INP | I | BYTE, UCHAR, WORD, LONG, LONGLONG, FLOAT, DOUBLE | Input signal |
| MIN | I | BYTE, UCHAR, WORD, LONG, LONGLONG, FLOAT, DOUBLE | Lower limit |
| MAX | I | BYTE, UCHAR, WORD, LONG, LONGLONG, FLOAT, DOUBLE | Upper limit |
| OUT | O | BYTE, UCHAR, WORD, LONG, LONGLONG, FLOAT, DOUBLE | Output signal |
| Qu | O | BIT | Minimum reached |
| Qo | O | BIT | Maximum reached |
Parameters
The parameter dialog can be used to select a data type.
Comments
If no connection exists, another data type can be assigned by creating a new connection.
If the data type is changed by the parameter dialog, all invalid connections will be deleted.
The data type BYTE is used as unsigned.