Db Assignment; Instance Db For Fb 58 "Tcont_Cp - Siemens SIMATIC Manual

Appendix
A.3

DB Assignment

A.3.1

Instance DB for FB 58 "TCONT_CP"

Parameters:
Addr Parameter Decl.
0.0 PV_IN INPUT
4.0 PV_PER INPUT
6.0 DISV INPUT
10.0 INT_HPOS INPUT
10.1 INT_HNEG INPUT
A-2
Data Range of Initial
Type values Value
REAL Depen- 0.0
dent on
the
sensors
used
INT 0
REAL 0.0
BOOL FALSE
BOOL FALSE
Description
PROCESS VARIABLE IN
An initialization value can be set at
the "Process Variable In" input or an
external process variable in floating-
point format can be connected.
PROCESS VARIABLE PERIPHERY
The process variable in the peripheral
I/O format is connected to the
controller at the "Process Variable
Peripheral" input.
DISTURBANCE VARIABLE
For feedforward control, the
disturbance variable is connected to
the "Disturbance Variable" input.
INTEGRAL ACTION HOLD IN
POSITIVE DIRECTION
The output of the integral action can
be blocked in a positive direction. To
achieve this, the INT_HPOS input
must be set to TRUE. In a cascade
control, the INT_HPOS of the primary
controller is interconnected to
QLMN_HLM of the secondary
controller.
INTEGRAL ACTION HOLD IN
NEGATIVE DIRECTION
The output of the integral action can
be blocked in a negative direction. To
achieve this, the INT_HNEG input
must be set to TRUE. In a cascade
control, the INT_HNEG of the primary
controller is interconnected to
QLMN_LLM of the secondary
controller.
PID Temperature Control
A5E00125039-02