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14-5

Ladder Logic (LAD) for S7-300 and S7-400

C79000-G7076-C504-02

14.3 Integer to BCD

The Integer to BCD conversion instruction reads the contents specified in the

input parameter IN as an integer value and converts this value to a three-digit

number in binary coded decimal format (BCD, " 999). The output

parameter OUT provides the result. If an overflow occurs, ENO is 0.

Certain restrictions apply to the placement of the Integer to BCD conversion

box (see Section 6.1).

Table 14-3 Integer to BCD Conversion Box and Parameters

LAD Box

Parameter Data Type Memory Area Description

EN BOOL I, Q, M, D, L Enable input

BCD

EN ENO

ENO BOOL I, Q, M, D, L Enable output

IN OUT

IN INT I, Q, M, D, L Integer number

OUT WORD I, Q, M, D, L Result in BCD format

Status Word Bits

BR CC 1 CC 0 OV OS OR STA RLO FC

Write 1 – – x x 0 1 x x

I 0.0

If the signal state of input I 0.0 is 1, the

conversion is executed. The contents of

memory word MW10 is read as an

integer and converted to a three-digit

number in BCD format. The result is

stored in memory word MW12. If an

overflow occurred, the signal state of

output Q 4.0 is 1. If the signal state at

input EN is 0 (that is, if the conversion is

not executed), the signal state of output

Q 4.0 is also 1.

Q 4.0

I_BCD

EN ENO

MW10 MW12

Function is executed (EN = 1):

NOT

OUT

Figure 14-3 Integer to BCD

Description

Move and Conversion Instructions

1 2 ... 178 179 180 181 182 183 184 185 186 187 188 ... 317 318

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