Detailed description
Original instructions
About us
Parametering
The parameter assignments of the function block are made by defining the GAIN, the differentiator and the time constant LAG, by which the output Y is delayed.
For very short sampling times and a unit jump at the X input (input X jumps from 0 to 1.0), the output Y jumps to the GAIN value (in theory - in reality somewhat smaller, due to the sampling time not being infinitely small), and then returns to 0 with the delay time constant LAG.
Operating modes
The function block SMOOTH_RATE has 3 operating mode: Automatic, manual and halt.
The operating mode are selected via the inputs MAN and HALT:
Operating mode
MAN
HALT
Meaning
Automatic
0
0
The function block operates as described in "Parametering".
Manual mode
1
0 or 1
The input YMAN will be transferred directly to the output Y.
Halt
0
1
The output Y will be held at the last calculated value.
Example
The following illustration shows the jump response of the function block SMOOTH_RATE when GAIN = 1 and LAG = 10 s: