Slave Diagnostics For Dp Standard Slaves - Siemens SIMATIC S5 Manual

9.4.1

Slave diagnostics for DP standard slaves

Overview On the IM 308-C master interface, the diagnostic functions are stored in
accordance with draft standard DIN 19245, Part 3.
The slave diagnostic functionality is stored separately for slaves that do not
comply with DIN 19245, Part 3 (see Section 9.4.2).
Structure of slave The structure of slave diagnostics varies from slave to DP slave. Not every
diagnostics slave diagnostic message is valid for each DP slave.
The header always indicates the type of diagnosis in question. The header
contains the type of slave diagnostics (station, module or channel
diagnostics) plus the length of the diagnostic bytes.
The first header is always in byte 6 of the slave diagnostics.
Table 9-10 shows the structure of the header for slave diagnostics:
Table 9-10 Structure of the header for station, module or channel diagnostics
Content of
The structure of the station, module and channel diagnostics is always
slave-specific
specific to the DP slave. See the manual on the DP slave for the meanings of
diagnostics
these diagnostics.
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
IM 308-C – addressing, diagnostics and use of the FB IM308C
Bit Value Meaning
7, 6 0 0 Code for station diagnostics
0 1 Code for module diagnostics
1 0 Code for channel diagnostics
5 to 0 – Length of diagnostics including header.
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