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14-8

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

C79000-G7076-C504-02

14.6 Double Integer to BCD

The Double Integer to BCD conversion instruction reads the contents

specified in the input parameter IN as a double integer value and converts

this value to a seven-digit number in BCD format (" 9,999,999). The output

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

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

conversion box (see Section 6.1).

Table 14-6 Double Integer to BCD Conversion Box and Parameters

LAD Box

Parameter Data Type Memory Area Description

DI B

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

BCD

EN ENO

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

IN OUT

IN DINT I, Q, M, D, L Double integer number

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

Status Word Bits

BR CC 1 CC 0 OV OS OR STA RLO FC

Write x – – x x x 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 double word MD8 is read as a

double integer and converted to a

seven-digit number in BCD format. The

result is stored in memory double word

MD12. 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

DI_BCD

EN ENO

MD8 MD12

Function is executed (EN = 1):

NOT

OUT

Figure 14-6 Double Integer to BCD

Description

Move and Conversion Instructions

1 2 ... 181 182 183 184 185 186 187 188 189 190 191 ... 317 318

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