Including The Function Block In The User Program; Calling The Controller Block - Siemens SIMATIC Manual

Continuous Temperature Controller FB 58 "TCONT_CP"
2.4

Including the Function Block in the User Program

2.4.1

Calling the Controller Block

The following diagram shows the control call in FBD:
FB TCONT_CP must be called at constant intervals. To achieve this, use a cyclic
interrupt OB (for example OB35 for an S7-300). The block interface provides the
most important parameters that allow you to interconnect the block with process
variables such as the setpoint, process value and manipulated variable (see also
Appendix A.3 DB Assignment). You can also connect a manual value or
disturbance variable directly to the block interface.
2-14
"TCONT_CP"
EN
PV_IN
PV_PER
DISV
INT_HPOS
INT_HNEG
SELECT
CYCLE
CYCLE_P
QLMN_HLM
SP_INT
MAN QLMN_LLM
COM_RST
MAN_ON
PV
LMN
LMN_PER
QPULSE
QC_ACT
ENO
PID Temperature Control
A5E00125039-02