Moeller Rapid Link, Switching And Installation System, Page: 39 / 162

01/08 AWB2190-1430GB
Indicating elements
35
Extended diagnostics of RA-IN
Extended diagnostics are used to localise intermittent
configuration errors and assessing the data transfer quality
through the AS-Interface
®
.
List of AS-Interface
®
slaves that have triggered
configuration errors (LCS)
To diagnose the causes of intermittent configuration errors on the
AS-Interface
®
, AS-Interface
®
masters with extended diagnostic
functionality maintain an additional l ist of c orrupted s laves (LCS)
that have caused a configuration error in addition to the list of
projected slaves (LPS), the list of detected slaves (LDS) and the list
of active slaves (LAS). This list contains all AS-Interface
®
slaves
that have caused at least one intermittent configuration error since
the last time this list was read or the AS-Interface
®
masters was
started up. In addition, the list contains any intermittent voltage
drops at the AS-Interface
®
, which are shown under slave address
0.
Telegram transmission error counter
The RA-IN with extended diagnostics provides an error counter for
each AS-Interface
®
slave, which increments with each incorrectly
transmitted AS-Interface
®
telegram. This allows a detection of
transmission quality problems even when only occasional
telegrams are corrupted without triggering an AS-Interface
®
slave
configuration error.
Offline phase on configuration errors
The RA-IN with extended diagnostics can be configured to
automatically go into the offline phase in the event of a
configuration error to set the AS-Interface
®
network into a safe
state. This allows a faster response to configuration errors and the
task does not have to be performed by the host.
Parameterising the AS-Interface
®
master for this function:
With every configuration error on the AS-Interface
®
the AS-
Interface
®
master changes from normal operation in protected
operation mode to offline phase.
A list of slaves that can trigger offline phase following a
configuration error is defined (LOS,
l ist of o ffline s laves). You can
decide yourself, how the RA-IN reacts to a configuration error on
the AS-Interface
®
. For critical AS-Interface
®
slaves, for example,
the master can be set to offline phase immediately while less
critical slaves can send a Configuration Error message to the host
without setting AS-Interface
®
offline.
PROFIBUS-DP
For information about using RA-IN in a PROFIBUS network, see
manual “CM4-505-GV1/-GV2, AS-i-/PROFIBUS Gateways”
(AWB2700-1409G). You can download this manual as a PDF file
from:
http://www.moeller.net/support , search term: AWB2700-
1409GB.
h With each read operation the LCS is cleared again.
h
The most recent intermittent configuration error can also
be viewed on the AS-Interface
®
master’s ´display:
To view the slave responsible for the last intermittent
configuration error on the AS-Interface
®
master’s display,
press the Set key. An intermittent voltage drop on the
AS-Interface
®
is indicated by a “39” on the display when
the Set key is pressed.
For this function the device must be in normal operation
in protected operation mode (display is blank) or in offline
phase (display shows “OFP”).
h The counter values are read through the corresponding
host interface and reset with each read access. The
highest valid current count is 254. A count of 255
indicates a counter overflow.