Diagnostics
7.4 Diagnostics with STEP 7 on PROFIBUS DP
M200D PROFIBUS/PROFINET
154 Manual, 08/2014, A5E01577426A/RS-AA/004
Station status 1 to 3
Definition
The stations status 1 to 3 provides an overview of the status of a DP slave.
Structure of station status 1 (byte 0)
0 1: The DP slave cannot be
addressed by the DP master.
• Is the correct PROFIBUS address set on the DP
slave?
• Is the bus connector in place?
• Does the DP slave have power?
• Correct configuration of the RS485 rpeater?
• Has the DP slave been reset?
1 1: DP slave is not ready for the
data exchange.
• Wait, the DP slave is currently starting up.
2 1: The configuration data sent to
the DP slave by the DP master
does not match the actual
configuration of the DP slave.
• Has the correct station type or the correct DP slave
configuration been entered in the configuration
software?
3 1: External diagnostics information
is pending.
(Group diagnostics indication)
• Evaluate the ID-specific diagnostics information, the
module status, and/or the channel-specific diagnostics
information. As soon as all errors are remedied the bit
3 is reset. The bit will be set again when there is a new
diagnostics message in the bytes of the
aforementioned diagnostics.
4 1: The required function is not
supported by the DP slave (for
example, changing the
PROFIBUS address by means of
software).
• Check configuration data.
5 1: The DP master cannot interpret
the response of the DP slave.
• Check the bus installation.
6 1: The DP slave type does not
match the software configuration.
• Has the correct station type been entered in the
configuration software?
7 1: DP slave was configured by a
different DP master (not by the DP
master that currently has access
to the DP slave).
• The bit is always 1 if, for example, you are currently
accessing the DP slave via PG or a different DP
master. The "master PROFIBUS address" diagnostic
byte contains the PROFIBUS address of the DP
master that assigned parameters to the DP slave.
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