Siemens Module B3 ユーザーズマニュアル
Automation and Drives - SCE
T I A Training Document
Page 33 of 64
Module
Assignment List:
Symbol:
Address: Comment
Start
I 1.3
Button Start
Stop
I 1.4
Button Stop
AI_Level_Actual
PEW 128
Analog input for the level sensor
AI_Level_Setpoint
PEW 130
Analog input for the setpoint selection
AI_Level_Act_Norm MD 20
Normalized value for the level
AI_Level_Setp_Norm
MD 24
Normalized value for the level setpoint
M_X1
MD 32
Intermediate flag half the differential
M_Xo
MD 36
Intermediate flag high operating point
M_Xs
MD 28
Intermediate flag switching hysteresis
M_Xu
MD 40
Intermediate flag low operating point
Controller_On
M 10.0
Flag controller is switched on
Pump
A 0.0
Pump activation binary
Display_ON
A 1.0
Indication: system is on
Analog
FC1
Subroutine analog value processing
Two Pos.Controller FC2
Subroutine two position controller
Exercise:
Create a project with hardware configuration for a CPU314C-2 DP (refer to Module A05) and change
the addresses according to the assignment list shown above.
There, create a program in an FC1 with the following functionality:
- The analog value for the process variable Level is to be entered, and normalized to the physical
variable "Liter“. The normalized value is made available in MD20 as a floating point number.
Create a project with hardware configuration for a CPU314C-2 DP (refer to Module A05) and change
the addresses according to the assignment list shown above.
There, create a program in an FC1 with the following functionality:
- The analog value for the process variable Level is to be entered, and normalized to the physical
variable "Liter“. The normalized value is made available in MD20 as a floating point number.
Note: If the level is 10 liters, the level sensor returns 0V, for 100 liters 10V.
- The analog value for the setpoint is to be entered, and made available normalized as floating point
number in MD24.
Save FC1.
Then, set up the two position controller in an FC2, based on the structogram provided above.
Call FC1 for inputting the setpoint and the actual value.
Save FC2 and call it in OB1. Save OB1 and load the entire station to the PLC.
- The analog value for the setpoint is to be entered, and made available normalized as floating point
number in MD24.
Save FC1.
Then, set up the two position controller in an FC2, based on the structogram provided above.
Call FC1 for inputting the setpoint and the actual value.
Save FC2 and call it in OB1. Save OB1 and load the entire station to the PLC.
Preface Fundamentals Discontinuous Action Controllerr Controller Block (S)FB41 Setting the System Appendix
B3
Issued: 02/2008 Control Engineering with STEP 7