Operation
25
Bit
number -
Description
Actions to be taken
1
"O-block of slave too
small"
In the configuration of
this DP slave more bytes
are requested for the
output data than are
specified in the device
database. ----
Check the slave-specific
configuration data
handed over to the DP
master and reduce their
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-related diagnostic
data contain additional
information. ---
2
"PRM conf greater than
CFG data“
Too many variable
indices are written in the
slave-specific parameter
data. -----The required
data block is greater than
the block specified in the
device-specific
configuration. -
Reduce the number of
variable indices in the
slave-specific parameter
data or increase the size
specified in the
slave-specific
configuration data. --- -
Bytes 12 to 16 of the
device-specific
diagnostic data contain
additional information.
3
"PRM Data: Obj-Id faulty"
-
At least one variable byte
index in the
slave-specific parameter
data is considered as
faulty by the slave. --
Check the individual
variable index bytes in
the slave-specific
parameter data. ---
Bytes 12 to 16 of the
device-specific
diagnostic data contain
more information.---
Bit
number-
Description
Actions to be taken
4
"Unknown module in
CFG"
Probably, the
slave-specific
configuration data has
been changed, and
these changes are not
accepted by the polled
slave. ----
Check the slave-specific
configuration data.
Compare with the device
database. --
Bytes 12 to 16 of the
device-specific
diagnostic data contain
additional information. ---
5
"Acyclic: Data cannot be
evaluated"
An acyclic write or read
service contains a
variable index that is
unknown to the
contacted slave. -----
Check the contents of
the acyclic telegram.
Make sure that it
contains correct and
known variable indices. --
-
Bytes 12 to 16 of the
device-specific
diagnostic data contain
additional information. ---
6
"Acycl: Unknown
service"
A service resides in a
storage area for a
request telegram which
complies neither with the
read job nor with the
write job. ----
Check the contents of
the acyclic telegrams for
the proper service index.
-
Bytes 12 to 16 of the
device-specific
diagnostic data contain
additional information. ---
7
"Acycl: Too many
services"
Check the slave-specific
configuration data and
reduce the number of
modules for acyclic read
and write services to a
maximum of four
services. --- Refer to the
device database for this.
-
