PROFIBUS DP communication module
9.9 Diagnosis with STEP 7
3RW44 soft starters
174
Manual, 03/2017, NEB535219502000/RS-AB/008
9.9.4
Station status 1 to 3
Definition
The station status 1 to 3 provides an overview of the status of a DP slave.
Table 9- 10 Structure of station status 1 (byte 0)
Bit
Meaning
Cause/remedy
0
1: The DP master cannot address the DP slave.
•
Correct station address set on the DP slave?
•
Is the bus connector in place?
•
Voltage at the DP slave?
•
Is the RS 485 repeater set correctly?
•
Reset triggered on the DP Slave?
1
1: The DP slave is not yet ready for the data
transfer.
•
Wait, the DP slave is currently starting up.
2
1: The configuration data transferred from the DP
master to the DP slave does not match the DP slave
configuration.
•
Verify the station type or DP slave configuration in the
configuration software.
3
1: External diagnostics information is pending
(group diagnostics indication)
•
Evaluate the ID-specific and/or channel-specific
diagnostic information, and the module status. 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 station address by
means of software).
•
Check the configuration.
5
1: The DP master cannot interpret the response of
the DP slave.
•
Check the bus configuration.
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: The DP slave has been parameterized by another
DP master (not by the DP master that has access to
the DP slave at the moment).
•
The bit is always 1, for example, if you access the DP
slave with the PG or another DP master.
The "Master PROFIBUS address" diagnostic byte
contains the station address of the DP master that
assigned parameters to the DP slave.