ProSoft Technology ProLinx S3964R Manual do Utilizador descarregar pdf (Página 90)

90 Publication LOGIX-AP010B-EN-P - May 2010

Chapter 3 Software Conversions Instructions

This BFD function is not available in RSLogix 5000 Structured Text but a

similar function called Bit Field Distribute with Target (BFDT) can produce

the same results.

Shift Left

The following example shows how S5 shifts the bits in FW18 by 4 places to the left and how the equivalent functionality is

achieved by using RSLogix software.

S5 RSLogix 5000

FW18 data_word1

FW20 data_word2

S5 Statement List

16 bit fixed point numbers

RSLogix 5000 Structured Text

LFW18

SLW 4

T FW20

BTDT_01.Source := data_word1;

BTDT_01.SourceBit := 0;

BTDT_01.Length := 32;

BTDT_01.DestBit := 4;

BTDT_01.Target := data_word2;

BTDT(BTDT_01);

data_word3 := BTDT_01.Dest;

SIMATIC S5 - Ladder

RSLogix 5000 - Ladder

1 2 ... 85 86 87 88 89 90 91 92 93 94 95 ... 139 140

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