Requesting Slave Diagnostics - Siemens SIMATIC S5 Manual

S5-95U – addressing, accessing the distributed I/O and diagnostics with STEP 5

10.3.2 Requesting slave diagnostics

Definition
Requesting slave
diagnostics
10-6
Slave diagnostics comprises a maximum of 34 bytes and is structured as
follows:
Number of the slave station that has submitted diagnostics data (1 byte)
Number of diagnostics bytes (1 byte)
Station status 1 to 3 (length: 3 bytes)
Station status 1 to 3 reflects the status of a DP slave.
Master-station number (length: 1 byte)
The diagnostics byte for the master station number contains the station
number of the DP master which parameterized the DP slave.
Manufacturer ID (length: 2 bytes)
The manufacturer ID contains a code with describes the type of the DP
slave.
Device-specific diagnostics (length depends on the type of DP slave)
The device-specific diagnostics provides general information on the DP
slave.
ID-specific diagnostics (length depends on the type of DP slave)
The ID-specific diagnostics indicates which module in which slot is
faulty.
Channel diagnostics (length depends on the type of DP slave)
Channel diagnostics indicates which channel of a DP slave has an error
message.
To request slave diagnostics, you must call the FB 230 in the STEP 5
application program.
Result: The FB 230 places the slave diagnostics data in a data block that you
created beforehand in the STEP 5 application program.
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a