HP Anab EQ5 - Manual (Page 76)

TECO –Westinghouse Motor Company Function Explanation 70
Analog signals input from control terminal 12 or C1 may
contain noise, which renders control unstable. This
function adjusts the time constant of the input filter to
remove the effects of noise.
Setting range: 0.00 to 5.00 seconds
An excessive setting delays control response though
stabilizing control. A set value too small speeds up
control response but renders control unstable.
If the optimum value is not known, adjust the setting when
control is unstable or response is delayed.
Note:
The set value is commonly applied to terminals 12 and C1.
For input of PID feedback amount, the PID control
feedback filter (set in H25) is used.
C 3 3 R E F F I L T E R