Error and system messages
4.4 Diagnostics with STEP 7
IM151-1 FO STANDARD interface module (6ES7151-1AB05-0AB0)
Manual, 02/2010, A5E01075965-03
43
Structure of station status 2 (byte 1)
Table 4- 4 Structure of station status 2 (byte 1)
Bit Meaning
0 1: The DP slave parameters need to be reassigned.
1 1: A diagnostics message is pending. The DP slave will not operate until the problem is
eliminated (static diagnostics message).
2 1: The bit on the DP slave is always "1".
3 1: The watchdog is activated for this DP slave.
4 1: The DP slave has received the "FREEZE" control command
1
.
5 1: The DP slave has received the "SYNC" control command
1
.
6 0: Bit is always "0".
7 1: The DP slave is disabled, that is, it has been removed from the processing in progress.
1
The bit is updated only if another diagnostics message changes also.
Structure of station status 3 (byte 2)
Table 4- 5 Structure of station status 3 (byte 2)
Bit Meaning
0 to 6 0: Bits are always set to "0".
7 1:
There are more diagnostics messages pending than the DP slave is able to store.
The DP master cannot enter all the diagnostics messages sent by the DP slave in
its diagnostics buffer (channel-specific diagnostics).
4.4.4 Master PROFIBUS address
Definition
The Master PROFIBUS address diagnostics byte contains the PROFIBUS address of the DP
master:
● That assigned parameters to the DP slave
● That has read and write access to the DP slave
The master PROFIBUS address is located in byte 3 of the slave diagnostics.
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