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Station status 2
MSB
Bit number
7
6
5
Table 12
This byte only contains status information data, which do not
require any actions.
Description of the individual bits:
Bit
numberDescription
0
This bit is set by the DP slave. -If the DP slave
sets this bit, it must be reconfigured, and its
parameters need to be redefined. -The bit remains
set until the slave is reconfigured.
1
When the DP slave sets this bit, the DP master
has to poll diagnostic data until the bit is unset
again. -- For example, the DP slave sets this bit
when it cannot provide valid usable data.
2
Always set to 1 by the DP slave.
3
This bit is set by the DP slave when its response
monitoring function is activated. -
4
This bit is set by the DP slave upon reception of
the Freeze control command. - -
5
This bit is set by the DP slave upon reception of
the Sync. control command. - -
6
Reserved
7
This bit is set by the DP master as soon as the DP
slave is marked as not active in the DP slave
parameter
transmission. ----- The DP slave always sets this
bit to 0.
Station status 3
Reserved. Is not set by the DP slave. -
Standard diagnostic data, 4th. byte
The address of the DP master that has configured this DP slave is
written in this byte. -- If the DP slave has not been configured by a
DP master, the DP master sets this byte to the address 255
(0xFF). ---
Standard diagnostic data, 5th. and 6th. byte
The ID number of the connected DP slave is written in these two
bytes. --
24 Operation
4
3
2
1
set
and
is
disabled
for
Device-related diagnostic data, 7th. byte
LSB
MSB
0
Bit number
7
Table 13
Description of the individual bits:
Bit Description
0 to 5Length of the device-related diagnostic data.- This value is
10 for controllers.
6 and 7Fixed to 00. Describes the additional diagnostic data as
device-specific diagnostic data. -- ID-related and
channel-related diagnostic data are not available.
Device-related diagnostic data, 8th. byte
MSB
Bit number
7
Table 14
Description of the individual bits (texts in quotation marks are
diagnostic messages from the device database):-
Bit
Description
number -
0
"I-block of slave too
small"
According to the
configuration more bytes
cyclic
for input data are
requested from this DP
slave than specified in
the device database. ----
6
5
4
3
6
5
4
3
Actions to be taken
Check the slave-specific
configuration data
handed over to the DP
master and reduce the
size, if required. Usually,
this implies a change of
the slave-specific
parameter data, because
they probably contain too
many variable indices. ---
----
Bytes 12 to 16 of the
device-specific
diagnostic data contain
additional information. ---
LSB
2
1
0
LSB
2
1
0
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