Host Connection Watchdog - Moxa Technologies ioLogik R2110 Series User Manual

ioLogik R2110 Series User's Manual
Safe Status is controlled by the ioLogik R2110's Host Connection Watchdog and is activated after
a break in RS-485 communication for a specified time interval. When the ioLogik R2110 enters
Safe Status (i.e. after the break in RS-485 communication), your DI/O channel will respond as
configured in its Safe Status settings.
For example, you could configure a DO channel to start output pulses at Safe Status. When the
Host Connection Watchdog determines that a break in RS-485 communication has occurred, it
activates Safe Status, and that DO channel will begin output pulses. You could configure a DI
channel that is in Event Counter mode to continue counting events in Safe Status, so that even
after a break in communication, that DI channel will continue counting events.
If the Host Connection Watchdog is not enabled, the ioLogikR2110 will never enter Safe Status.
This means that if the Host Connection Watchdog is not enabled, your Safe Status settings will
have no effect.
To configure a DI/O channel's Safe Status settings, double-click on the channel in the I/O Status
tab. For DI channels in Event Counter mode, you can configure whether or not counting starts or
continues when Safe Status has been activated. For DO channels in DO mode, you can configure
whether or not the DO is set to OFF or ON at Safe Status. For DO channels in Output Pulse mode,
you can configure whether or not the output pulse commences or continues at Safe Status.

Host Connection Watchdog

The activates Safe Status when RS-485 communication between the PC and the ioLogik R2110
has been disrupted for a configurable amount of time. You may configure the Watchdog by going
to the Watchdog tab.
By default, the Watchdog is disabled. When the Watchdog is enabled and a timeout occurs, the
ioLogik R2110 will enter Safe Status, and you may configure how each DI/O channel responds in
the channel's Safe Status settings.
To enable the Watchdog, check off Enable Host Connection Watchdog, set the Timeout value,
and restart the server. With Watchdog enabled, the ioLogik R2110 will first wait after a RS-485
communications disruption before entering Safe Status. The amount of time it will wait is set by
the Timeout value.
When a timeout occurs, a warning will be visible in the Watchdog tab, stating Host Connection
Lost Alarmed! You may click on Clear Alarm to reset the Watchdog and deactivate Safe Status.
If there is another disruption in communication, the Watchdog will activate Safe Status again.
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Configuring with ioAdmin