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Reference Data

A-6

SIMATIC 505 PROFIBUS-FMS CP User Manual

A.2 Data Access between SIMATIC S7 and SIMATIC 505 Systems

Variables

in the SIMA

TIC 505 system are addressed sequentially starting

from 1 regardless of the data size, and the quantity of data is measured in

multiples of the variable size. For example, V1, 1 represents 16 bits of data

and LSP1, 1 represents 32 bits of data.

In the SIMA

TIC S7 system, variables are numbered from 0 and use

“byte.bit” addressing, and the quantity of data is measured in multiples of a

specified data type. For example, DB1 DBX0.0 WORD 1 represents 16 bits

of data and DB1 DBX0.0 DWORD 1 represents 32 bits of data.

Packed bits (XP

, YP

, CP) can only be accessed in multiples of 8 bits using S7

addresses. Use the S7 data type BYTE to access packed bits.

Each unpacked bit (X, Y

, C) in the SIMA

TIC 505 is represented by eight

bits, which correspond to the S7 BOOL data type. However

, S7 addressing

restricts BOOL data to single items. T

o access multiple unpacked bits, use

the BYTE data type.

able

A-2 shows examples of the equivalent addressing formats between a

SIMA

TIC 505 programmable controller system and a SIMA

TIC S7 system.

These examples show how to use S7 protocol read and write requests to

access data in the SIMA

TIC 505 system.

able A-2

Equivalent Addr

ess For

mats for SIMA

TIC 505 and S7 Systems

505 Addressing Format S7 Addressing Format

V1,

V2, 1

V3, 1

V4, 1

V1, 2

DB256 DBX0.0 WORD 1

DB256 DBX2.0 WORD 1

DB256 DBX4.0 WORD 1

DB256 DBX6.0 WORD 1

DB256 DBX0.0 WORD 2

V32768, 1

V32769, 1

V32770, 1

DB256 DBX65534.0 WORD 1

DB257 DBX0.0 WORD 1

DB257 DBX2.0 WORD 1

X1, 1

Y2, 1

DB3 DBX0.0 BOOL 1

DB4 DBX1.0 BOOL 1

XP1, 8

YP1, 8

CP1, 8

I 0.0 BYTE 1*

Q 0.0 BYTE 1*

M 0.0 BYTE 1

WX1, 1

TCC1, 1

LSP1, 1

LSP2, 1

DB9 DBX0.0 WORD 1

DB15 DBX0.0 WORD 1

DB43 DBX0.0 DWORD 1

DB43 DBX4.0 DWORD 1

DCP6 S4, 2

DB18 DBX10.3 WORD 2

0.0 and Q 0.0 are the mnemonics used in the International Mnemonic set. The equivalent

mnemonics in the SIMA

TIC set are E 0.0 and A 0.0, respectively

SIMATIC 505

Addressing

SIMA

TIC S7

Addressing

Special

Considerations

Addressing

Examples

1 2 ... 155 156 157 158 159 160 161 162 163 164 165 ... 186 187

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