Siemens SIMATIC Manual page 84

Appendix
Addr Parameter
72.0 LMN_OFFS INPUT
76.0 PER_TM
80.0 P_B_TM
84.0 TUN_DLMN INPUT
88.0 PER_
MODE
90.0 PVPER_ON INPUT
A-6
Decl. Data Range of
Type Values
REAL
≥ CYCLE
INPUT REAL
≥ 0.0 s
INPUT REAL
REAL -100.0 to
100.0 %
INPUT INT 0, 1, 2
BOOL
Initial Description
Value
0.0 MANIPULATED VARIABLE
OFFSET
The "manipulated variable offset"
input is added to the value of the
manipulated variable. The input is
used to adapt the manipulated
variable range.
1.0 s PERIOD TIME [s]
The pulse repetition period of the
pulse duration modulation is
entered at the PER_TM parameter.
The relationship of the pulse
repetition period to the sampling
time of the pulse generator decides
the accuracy of the pulse duration
modulation.
MINIMUM PULSE/
0.02 s
BREAK TIME [s]
A minimum pulse or minimum
break time can be set at the
"minimum pulse/break time"
parameter. P_B_TM is limited
internally to > CYCLE_P.
DELTA MANIPULATED
20.0
VARIABLE FOR PROCESS
EXCITATION
Process excitation for controller
tuning results from a setpoint step
change at TUN_DLMN.
PERIPHERY MODE
0
You can enter the type of the I/O
module at this switch. The process
variable at input PV_PER is then
normalized to °C at the PV output.
•
PER_MODE =0: standard
•
PER_MODE =1: climate
•
PER_MODE =2: current/voltage
FALSE PROCESS VARIABLE
PERIPHERY ON
If you want the process variable to
be read in from the I/O, the
PV_PER input must be connected
to the I/O and the "process variable
periphery" input must be set.
PID Temperature Control
A5E00125039-02