Endress+Hauser iTEMP TMT 165 FOUNDATION Fieldbus Betriebsanleitung Seite 143

FOUNDATION Fieldbus temperature transmitter
Index Parameter
30 BKCAL_HYS
Endress+Hauser
PID Function Block (PID controller)
Write access with
operating mode
(MODE_BLK)
ROUT - RCAS - CAS - For entry of the hysteresis value for the upper and lower actuating variable
AUTO - range limit value OUT_HI_LIM and OUT_LO_LIM.
MAN - OOS The hysteresis value relates to a percentage of the value in the parameter
group OUT_SCALE (see page 152).
If the calculated actuating variable is outside the range defined by the range
limit values then this range violation is shown in the monitoring parameter
LIMITS in the parameter group OUT and communicated to the subsequent
blocks. The range violation remains active whilst the value of the calculated
actuating variable is outside the hysteresis value.
User input:
Factory default:
Example:
The top diagram shows the defined actuating variable range limit values
OUT_HI_LIM and OUT_LO_LIM with the hysteresis BKCAL_HYS (gray
background) and the signal curve of the calculated actuating variable.
The bottom diagram shows the behaviour of the range limit value monitor
LIMITS in the parameter group OUT to the changing signal curve of the
calculated actuating variable.
"NotLimited"
"HighLimited"
"LowLimited"
Description
0...50%
0.5%
= No range limit value violation
= Range limit value violation is output
= Range limit value violation is output
11 Appendix
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