Diagnostics Using the User Program
10-18
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
10.4 Example of a diagnosis in redundant operation
Introduction
This example shows the call of a typical diagnosis of the active IM 157 in
redundant operation.
10.4.1 Task
The following assumptions have been made for this example:
Both IM 157 have the diagnostic address 3FE
H
.
The underlying PROFIBUS master system consists of 4 configured slaves
Slaves have the addresses 4, 8, 12 and 20
Configuration of the slaves:
– Slave 4 is a non-modular slave
– Slave 8 consists of one header module and 6 modules
– Slave 12 consists of one header module and 2 modules
– Slave 20 consists of one header module and 3 modules
All configured slaves are engaged in data exchange with the active IM 157.
Slave 8 reports a diagnosis:
– Modules 1 and 3 report diagnoses
– Module 1 reports a limit violation
– Module 3 reports an incorrect configuration
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