Siemens SIMATIC Distributed I/O System DP/ASi Link Manual de servicio descargar pdf (Pagina 96)

8-10

Distributed I/O System DP/ASi Link

EWA 4NEB 710 6055-02b

8.2.3 Structure of Diagnosis

The structure of the diagnostic message conforms with the PROFIBUS-DP

standard.

Note

The structure of the diagnostic message described below does not apply to a

default start-up (refer to section 8.2.9).

The diagnostic message for the IM308C contains 26 bytes of data. The struc-

ture of the complete diagnosis is shown in Table 8-6.

Table 8-6 Structure of diagnostic message

Byte(s) Contents

0 Station status 1

1 Station status 2

2 Station status 3

3 Station number, DP master

Manufacturer ID (801B

)

6 Header and length of module diagnosis

7 Module diagnosis

8 Header and length of first station diagnosis

9 Length of S7 area

10 Reserved

11 Reserved

12 – 15 Part 1 of diagnostic data

16 Length of second station diagnosis (ASi-specific part)

17 Length of S7 area

18 Reserved

19 Reserved

20 – 25 Part 2 of diagnostic data.

Introduction

Structure for

IM 308C

Diagnostics and Error Handling

1 2 ... 91 92 93 94 95 96 97 98 99 100 101 ... 151 152

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Siemens SIMATIC Distributed I/O System DP/ASi Link Manual de servicio Pagina 96