Endress+Hauser iTEMP TMT 165 FOUNDATION Fieldbus Betriebsanleitung Seite 153

FOUNDATION Fieldbus temperature transmitter
Index Parameter
7 PV
16 PV_FTIME
10 PV_SCALE
26 RATE
32 RCAS_IN
Endress+Hauser
PID Function Block (PID controller)
Write access with
operating mode
(MODE_BLK)
read only Displays the process variable used for the block execution, including the
status.
2
The unit used is copied from the parameter group PV_SCALE.
ROUT - RCAS - CAS - Entry of the filter time constant (in seconds) of the digital filter of the 1st
AUTO - order. This time is required in order for 63% of a change in the controlled
MAN - OOS variable at input IN to have an effect on the value of PV.
The diagram shows the signal curves between the parameters IN and PV
over time:
a) The parameter IN changes.
b) The parameter PV has reacted 63% to the change in the parameter IN.
Factory default:
OOS Definition of the measurement range (lower and upper limit), the physical unit
and the number of decimal places for the process variable (PV).
Factory default:
2
If this parameter group is modified then the following parameters should be
checked and modified if necessary:
- DV_HI_LIM
- HI_LIM
- LO_LIM
- RCAS_IN
- SP_LO_LIM
- SP
ROUT - RCAS - CAS - Entry of the time constant for the derivative action (D-term).
AUTO -
MAN - OOS Factory default:
ROUT - RCAS - CAS - In this parameter the analogue actuating variable provided by the fieldbus
AUTO - host system (value and status) is read in for internal calculation of the
MAN - OOS actuating variable and displayed.
2
• Value statement and unit of PV_SCALE
• If the setting for the end of the scale is changed in the parameter
PV_SCALE this value should be modified accordingly.
• This parameter is only active in operating mode RCAS.
Description
Note!
0 s
0...100%
Note!
- DV_LO_LIM
- HI_HI_LIM
- LO_LO_LIM
- RCAS_OUT
- SP_HI_LIM
0 s
Note!
11 Appendix
153