Siemens SIMATIC S7-200 - Integer to Byte; Conversion Example

IEC 1131-3 Instructions
10-33
S7-200 Programmable Controller System Manual
A5E00066097-02
Integer to Byte
The Integer to Byte function converts the integer value
(IN) to a byte value and loads the result into the variable
specified by OUT.
Error conditions that set ENO = 0: SM1.1 (overflow),
SM4.3 (run-time), 0006 (indirect address)
This function affects the following Special Memory bits:
SM1.1 (overflow).
Inputs/Outputs Operands Data Types
IN VW, IW, QW, MW, SW, SMW, LW, T ,C, AIW, AC, Constant,
*VD, *LD, *AC
INT
OUT VB, IB, QB, MB, SB, SMB, LB, AC, *VD, *LD, *AC BYTE
Conversion Example
LAD
%I0.0
I_TO_DI
EN
IN OUT
MUL
EN
IN OUT
EN
IN1
IN2
OUT
ROUND
EN
IN OUT
%VW20 %AC1
%AC1
%VD0
%VD0
%VD4
%VD8
%VD8 %VD12
Clear accumulator 1.
Load counter value
(number of inches)
into AC1.
Convert to a real number.
Multiply by 2.54 to change
to centimeters.
Convert back to an integer.
BCD_TO_I
EN
IN OUT%VW100 %VW100
ENO
ENO
ENO
ENO
ENO
DI_TO_R
MUL
Network 1
Network 2
%I3.0
Figure 10-12 Example of Real Number Conversion Instruction for LAD
L
A
D
F
B
D
I_TO_B
EN
IN OUT
ENO
222 224
✓✓✓
221 226
✓