AS-i/PROFIBUS-Gateway
Advanced Diagnostics for AS-i Masters
Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
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8
Advanced Diagnostics for AS-i
Masters
The advanced AS-i diagnostics serve to locate occasionally occurring errors and
to judge the quality of data transmission on AS-i without additional diagnostics
tools.
AS-i Control Tools
(software for comfortable commissioning of AS-i and pro-
gramming of AS-i Control) supports the operation of the advanced diagnostics
(LCS, error counters and LOS).
8.1
List of corrupted AS-i Slaves (LCS)
The
LCS
contains the history of the delta list. Besides the list of projected slaves
(
LPS
), the list of detected slaves (
LDS
) and the list of activated slaves (
LAS
), a
fourth list, the
list of corrupted slaves (LCS)
, is created by AS-i masters with ad-
vanced diagnostics in order to locate occasionally occurring short-time configura-
tion errors. This list contains entries of all AS-i slaves which were responsible for
at least one configuration error since powering up the AS-i master or reading the
list. Short-time AS-i power failures are listed in the
LCS
at the position of AS-i slave
with address 0.
8.2
Protocol analysis: counters of corrupted data telegrams
The AS-i master with advanced diagnostics has a counter of telegram repetitions
for each AS-i slave, which count up every time a corrupted data telegram has been
found. This makes possible to judge the quality of the AS-i network, even if only a
few corrupted telegrams occured and the AS-i slave did not cause any configura-
tion errors.
The protocol analysis is included in the sofware
AS-i Control Tools
(by using the
command
Master
|
AS-i Diagnostics
).
With every read-access the LCS will be deleted.
The last short-time configuration error can also be displayed on the AS-i mas-
ter:
• Pressing the "Set" button of the AS-i master shows the AS-i slave which was
responsible for the last short-time configuration error. If there was a short-time
AS-i power failure the display shows "39" after pressing the "Set" button.
• This function is only available if the device is in the normal operation mode of
the protected mode (display empty) or in the off-line-phase.
• The counter values can be read via the host interface and will be deleted with
every read access.
• The counter value is limited to 254. 255 will cause a counter overflow.
