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TAC Xenta Server – Gateway, Technical Manual B Protocols
Schneider Electric Buildings AB, June 2011 121 (184)
04-00124-06-en
Device Status Signal
For each device the Modbus Master driver generates a communication
status signal.
• ComsFail – Flags if communications with the slave device have
failed. May be caused by an incorrect device address having been
entered, or by incorrect wiring of the RS-485 network connection
to it.
• online – Flags ONLINE during normal device communications,
and will change to OFFLINE if communications with the slave
device have failed. An OFFLINE condition normally indicates an
incorrect device address having been entered, or by incorrect wir-
ing of the network connection to it.
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