Sec. 41.1.2, Section 41.1.2 – Westermo RedFox Series User Manual
Page 950
Westermo OS Management Guide
Version 4.17.0-0
The MicroLok Gateway can be configured to give an alarm if one or more of
the established sessions is down, see sec:microlok-status-alarm.
Note
Serial port settings (rate, start bits, stop bits, parity) etc. is configured in
the general serial port contexts, see
(Web) and
(CLI).
Note that MicroLok stations typically operate with speeds in range 300-
38400 bits/s, while serial ports on WeOS units default to rate 115200 bit/s,
and should therefore be changed.
41.1.2
MicroLok Session Status and Alarm Handling
The MicroLok Gateway keeps track of established MicroLok sessions, and filters
out data packets not belonging to an established session. (MicroLok session ini-
tialisation packets are always forwarded by the gateway, but MicroLok data pack-
ets not matching an established session will be dropped.) It is possible to view
the MicroLok session status (
for Web and
for CLI),
to list which sessions that are UP, which are DOWN, and which are in INIT state:
❼ Status UP: A session is considered up when the initialisation handshake be-
tween the two stations has finished, and where data and control traffic is
exchanged within the given session timeout for these stations.
❼ Status DOWN: For a session to be listed as DOWN, it must first have been
UP. If no data or control traffic for the session is detected within the given
session timeout it is considered down.
Sessions which are DOWN will have their data packets filtered. To get status
UP, a new initialisation handshake is needed.
❼ Status INIT: New sessions which have not yet finished the initialisation hand-
shake are listed as INIT.
When the MicroLok gateway service starts, the list of current sessions is empty.
(The same is true if a MicroLok Gateway configuration change occurs, as this
implies a restart of the gateway process.) As new sessions are established the
list of current MicroLok sessions grows. As of WeOS v4.17.0, up to 64 MicroLok
sessions are supported. When one or more of the sessions in the current list
is determined DOWN, a MicroLok alarm will be raised. The alarm will indicate
failure state until all sessions in the current list have got status UP. To use this
MicroLok summary alarm function, you need to create a MicroLok alarm trigger,
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