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14-11

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

C79000-G7076-C504-02

14.9 Ones Complement Double Integer

The Ones Complement Double Integer instruction reads the contents

specified in the input parameter IN and performs the Boolean word logic

operation Exclusive Or Word (see Section 15.6) masked by FFFF FFFF

, so

that every bit is changed to the opposite value. The output parameter OUT

provides the result. ENO and EN always have the same signal state.

Certain restrictions apply to the placement of the Ones Complement Double

Integer conversion box (see Section 6.1).

Table 14-9 Ones Complement Double Integer Box and Parameters

LAD Box Parameter Data Type Memory Area Description

INV DI

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

INV

EN ENO

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

IN OUT

IN DINT I, Q, M, D, L Input value

OUT DINT I, Q, M, D, L Ones complement double integer

Status Word Bits

BR CC 1 CC 0 OV OS OR STA RLO FC

Write x – – – – x 1 x x

I 0.0

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

conversion is executed. Each bit of memory

double word MD8 is changed:

MD8 =FFFF FFFF → MD12 = 0000 0000

If the conversion is not executed, the signal

state of output Q 4.0 is 1 (ENO = EN).

Q 4.0

INV_DI

EN ENO

MD10INMD8

NOT

OUT

Function is executed (EN = 1):

Figure 14-9 Ones Complement Double Integer

Description

Move and Conversion Instructions

1 2 ... 184 185 186 187 188 189 190 191 192 193 194 ... 317 318

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