Siemens SIMATIC Manual page 89

Addr Parameter
208.0 TM_LAG_P
212.0 T_P_INF
216.0 P_INF
220.0 LMN0
224.0 PV0
228.0 PVDT0
232.0 PVDT
236.0 PVDT_MAX OUTPUT REAL
240.0 NOI_PVDT
244.0 NOISE_PV
248.0 FIL_CYC
PID Temperature Control
A5E00125039-02
Decl. Data Range of
Type Values
OUTPUT REAL
OUTPUT REAL
OUTPUT REAL Dependent
on the
sensors
used
OUTPUT REAL 0 to 100%
OUTPUT REAL Dependent
on the
sensors
used
OUTPUT REAL
OUTPUT REAL
OUTPUT REAL
OUTPUT REAL
OUTPUT INT 1 ... 1024
Initial Description
Value
0.0 TIME LAG OF PTN MODEL [s]
Time lag of a PTN model (practical
values only for N_PTN >= 2).
0.0 TIME TO POINT OF
INFLECTION [s]
Time from process excitation until
the point of inflection.
PV AT POINT OF INFLECTION -
0.0
PV0
Process variable change from
process excitation until the point of
inflection.
MANIPULATED VAR. AT BEGIN
0.0
OF TUNING
Detected in phase 1 (mean value).
0.0 PROCESS VALUE AT BEGIN OF
TUNING
0.0 RATE OF CHANGE OF PV AT
BEGIN OF TUNING [1/s]
Sign adapted.
CURRENT RATE OF CHANGE OF
0.0
PV [1/s]
Sign adapted.
MAX. RATE OF CHANGE OF PV
0.0
PER SECOND [1/s]
Maximum rate of change of the
process variable at the point of
inflection at the (sign adapted,
always > 0), used to calculate TU
and KIG.
0.0 RATIO OF NOISE IN PVDT_MAX
IN %
The higher the proportion of noise,
less accurate (less aggressive) the
control parameters.
ABSOLUTE NOISE IN PV
0.0
Difference between maximum and
minimum process variable in
phase 1.
1 NO OF CYCLES FOR MEAN-
VALUE FILTER
The process variable is averaged
over FIL_CYC cycles. When
necessary, FIL_CYC is increased
automatically from 1 to a maximum
of 1024.
Appendix
A-11