| Type |
Function module |
| Input IN |
REAL (input signal) |
| K |
REAL (multiplier) |
| RUN |
BOOL (enable input) |
| Output OUT |
REAL (derivation of the input signal K *X/ T ) |
|
FT_DERIV is a D-link, or LZI-transfer element, which has a differentiating transfer behavior. At the output of FT_DERIV the derivative is over time T in seconds. When the input signal increases in one second from 3 to 4 then the output 1 * K (K * X / T = 1 * (4-3) / 1 = 1 |
|
In other words, the derivative of the input signal, the instantaneous slope of the input signal. With the input RUN the FT_DERIV can be enabled or disabled. FT_DERIV works internally in microseconds and fulfill also the requirements of very fast PLC controller with cycle times under a millisecond. |
| Structure diagram |
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