6 PID function block (PID controller) PROline Prosonic Flow 93 FOUNDATION Fieldbus
200 Endress+Hauser
BKCAL_HYS ROUT - RCAS -
CAS - AUTO -
MAN - OOS
Entry of the hysteresis value for the upper and lower manipulated
variable range limit value OUT_HI_LIM and OUT_LO_LIM. The
hysteresis value relates to a percentage of the value in the
OUT_SCALE parameter group, (see Page 212).
If the calculated manipulated variable exceeds or undershoots
the range defined by the range limit values then this range
violation is shown in the LIMITS monitoring parameter in the OUT
parameter group and communicated to the downstream blocks.
The range violation remains active as long as the value of the
calculated manipulated variable does not undershoot or
overshoot the hysteresis value again.
User input:
0...50%
Factory setting:
0.5%
Example:
The top diagram shows the defined manipulated variable range
limit values OUT_HI_LIM and OUT_LO_LIM with the BKCAL_HYS
hysteresis (grey background) and the signal curve of the
calculated manipulated variable.
The bottom diagram shows the behaviour of the LIMITS range
limit value monitor, of the OUT parameter group, to the changing
signal curve of the calculated manipulated variable.
"NotLimited" = No range limit value violation
"HighLimited" = Range limit value violation is output
"LowLimited" = Range limit value violation is output
a = The calculated manipulated variable exceeds the upper
manipulated variable range limit value OUT_HI_LIM. In the OUT
parameter group the status "HighLimited" is output via LIMITS.
b = The calculated manipulated variable undershoots the
BKCAL_HYS hysteresis value of the upper manipulated variable
range limit value OUT_HI_LIM. In the OUT parameter group the
status "NotLimited" is output via LIMITS.
c = The calculated manipulated variable undershoots the lower
manipulated variable range limit value OUT_LO_LIM. In the OUT
parameter group the status "LowLimited" is output via LIMITS.
d = The calculated manipulated variable exceeds the
BKCAL_HYS hysteresis value of the lower manipulated variable
range limit value OUT_LO_LIM. In the OUT parameter group the
status "NotLimited" is output via LIMITS.
PID function block (PID controller) / base index 810
Parameter Write access
with operating
mode
(MODE_BLK)
Description
F06-53xFFxxx-05-xx-xx-en-004
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