Example Of Conversion Instructions For Simatic Lad, Stl, And Fbd - Siemens SIMATIC S7-200 System Manual

SIMATIC Instructions
Convert Example
Network 1
I0.0
C10
AC1
VD0
VD4
VD8
Network 2
I3.0
AC0
Network 1
I_DI
I0.0 EN
C10 IN
Network 2
BCD_I
I3.0 EN
AC0 IN
C10
VD0
VD4
VD8
V12
Figure 9-42
9-134
LAD
To convert from an
integer to a real number:
I_DI
Clear accumulator 1.
EN
ENO
Load counter value
(number of inches)
IN OUT AC1
into AC1.
DI_R
EN
ENO
Convert to a real number.
IN OUT VD0
MUL_R
EN
ENO
Multiply by 2.54 to change
IN1 OUT
VD8
to centimeters.
IN2
ROUND
EN ENO
Convert back to an integer.
IN OUT VD12
BCD_I
EN
ENO
IN OUT AC0
DI_R
ENO EN ENO
OUT AC1 AC1 IN OUT
ENO
OUT AC0
Double Word Integer to Real and Round
101
Count = 101 inches
101.0
2.54 2.54 constant (inches to centimeters)
256.54 256.54 centimeters as real number
257 257 centimeters as integer

Example of Conversion Instructions for SIMATIC LAD, STL, and FBD

Network 1
LD
ITD
DTR
MOVR
*R
ROUND
Network 2
LD
BCDI
FBD
MUL_R
EN ENO
IN1 OUT
VD0 VD8
VD0 VD4 IN2
Application
S7-200 Programmable Controller System Manual
STL
I0.0
C10, AC1
AC1, VD0
VD0, VD8
VD4, VD8
VD8, VD12
I3.0
AC0
ROUND
EN ENO
VD8 IN OUT VD12
BCD to Integer
AC0 1234
BCDI
AC0 04D2
A5E00066097-02