Siemens SIMATIC Manual page 88

Appendix
Addr Parameter
186.3 UNDO_
PAR
186.4 SAVE_PAR INPUT/
186.5 LOAD_PID
186.6 PID_ON
188.0 GAIN_P
192.0 TU
196.0 TA
200.0 KIG
204.0 N_PTN
A-10
Decl. Data Range of
Type Values
INPUT/ BOOL
OUTPUT
BOOL
OUTPUT
INPUT/ BOOL
OUTPUT
INPUT/ BOOL
OUTPUT
OUTPUT REAL
≥ 3*CYCLE 0.0
OUTPUT REAL
OUTPUT REAL
OUTPUT REAL
OUTPUT REAL 1.01 to 10.0 0.0
Initial Description
Value
FALSE UNDO CHANGE OF
CONTROLLER PARAMETERS
FALSE SAVE CURRENT CONTROLLER
PARAMETERS
Saves the controller parameters
PFAC_SP, GAIN, TI, TD, D_F
CONZ_ON and CON_ZONE in the
data structure PAR_SAVE.
FALSE LOAD OPTIMIZED PI/PID
PARAMETERS
Loads the controller parameters
GAIN, TI, TD depending on
PID_ON from the data structure
PI_CON or PID_CON (only in
manual mode)
TRUE PID MODE ON
At the PID_ON input, you can
specify whether or not the tuned
controller will operate as a PI or
PID controller.
•
PID controller:
PID_ON = TRUE
•
PI controller:
PID_ON = FALSE
It is nevertheless possible that with
certain process types, only a PI
controller will be designed despite
PID_ON = TRUE.
PROCESS PROPORTIONAL
0.0
GAIN
Identified process gain. For the
process type I, GAIN_P tends to be
estimated too low.
DELAY TIME [s]
Identified delay of the process.
0.0 RECOVERY TIME [s]
Identified system time constant of
the process. For the process type I,
TA tends to be estimated too low.
MAXIMAL ASCENT RATIO OF PV
0.0
WITH 100 % LMN CHANGE
GAIN_P = 0.01 * KIG * TA
PROCESS ORDER
The parameter specifies the order
of the process. "Non-integer
values" are also possible.
PID Temperature Control
A5E00125039-02