
4Ć163FST Configuration
Original Ć June 1990 CE4.2:CL6211
VLIM VLIM
(Continued from previous page)
OPERAND DESCRIPTIONS:
Velocity limit - This tuning parameter specifies the value of the velocity limit. It must have the
same units as the SVA input expressed as a rate of change (E.U.'s / minute). The velocity limit can
be any non-negative floating point number.
Comment - A comment up to 255 characters long.
FUNCTION EQUATIONS:
If |SVA(in) - HA| <= Velocity limit X Dt
Then SVA(out) = SVA(in), SVD(out) = 0
If SVA(in) - HA > Velocity limit X
Dt
Then SVA(out) = HA + (Velocity limit X
Dt), SVD(out) = 1
If HA - SVA(in) > Velocity limit X
Dt
Then SVA(out) = HA - (Velocity limit X
Dt), SVD(out) = 1
Where: HA = SVA(out) last cycle
Dt = sample time in minutes
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