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Table Of Contents
SFBs for Integrated Control
System Software for S7-300/400 System and Standard Functions - Volume 2/2
27-6
A5E00739858-01
Parameter Data Type Range of Values Default Description
PV_PER WORD W#16#000
0
PROCESS VARIABLE PERIPHERAL
The process variable in the I/O format is
connected to the controller at the "process
variable peripheral" input.
MAN REAL
-100.0 to +100.0
(%) or phys. Value
2)
0.0 MANUAL VALUE
The "manual value" input is used to set a
manual value using the operator interface
functions.
GAIN REAL 2.0 PROPORTIONAL GAIN
The "proportional value" input specifies the
controller gain.
TI TIME >= CYCLE T#20s RESET TIME
The "reset time" input determines the time
response of the integrator.
TD TIME
>= CYCLE
T#10s DERIVATIVE TIME
The "derivative time" input determines the
time response of the derivative unit.
TM_LAG TIME
>= CYCLE/2
T#2s TIME LAG OF THE DERIVATIVE ACTION
The algorithm of the D action includes a
time lag that can be assigned at the "time
lag of the derivative action" input.
DEADB_W REAL
>= 0.0 (%)
or phys. Value 1)
0.0 DEAD BAND WIDTH
A dead band is applied to the error. The
"dead band width" input determines the size
of the dead band.
LMN_HLM REAL
LMN_LLM ...100.0
(%)
or phys. Value 2)
100.0 MANIPULATED VALUE HIGH LIMIT
The manipulated value is always limited by
an upper and lower limit. The "manipulated
value high limit" input specifies the upper
limit.
LMN_LLM REAL
-100.0... LMN_HLM
(%)
or phys. Value 2)
0.0 MANIPULATED VALUE LOW LIMIT
The manipulated value is always limited by
an upper and lower limit. The "manipulated
value low limit" input specifies the lower
limit.
PV_FAC REAL 1.0 PROCESS VARIABLE FACTOR
The "process variable factor" input is
multiplied by the process variable. The
input is used to adapt the process variable
range.
PV_OFF REAL 0.0 PROCESS VARIABLE OFFSET
The "process variable offset" input is added
to the process variable. The input is used to
adapt the process variable range.
LMN_FAC REAL 1.0 MANIPULATED VALUE FACTOR
The "manipulated value factor" input is
multiplied by the manipulated value. The
input is used to adapt the manipulated
value range.
LMN_OFF REAL 0.0 MANIPULATED VALUE OFFSET
The "manipulated value offset" is added to
the manipulated value. The input is used to
adapt the manipulated value range.