Product manual

B Protocols TAC Xenta Server – Gateway, Technical Manual
170 (184) Schneider Electric Buildings AB, June 2011
04-00124-06-en
Device Status Signal
For each metering device the M-Bus interface driver generates several
status signals.
• ComsFail – Flags if communications with the meter have failed.
May be because of a meter or cable fault, or because of an address
mismatch.
• ValuesFail – Flags if one or more metered values expected from
the meter are not being received. Most likely caused by an incor-
rect signal definition in the device template.
• IdentNum – Indicates the identification number being reported by
the meter. May be used as the meter’s secondary address rather
than using primary addressing.
• Medium – Indicates the physical medium being metered. This is
an enumerated value of Unknown, Oil, Electricity, Gas, Heat,
Steam, Water, Air, CoolingLoad or Pressure.
• online – Flags ONLINE during normal device communications,
and will change to OFFLINE if communications with the meter
have failed. An OFFLINE condition normally indicates an incor-
rect device address having been entered, or by incorrect wiring of
the network connection to it.
Note
• Time-outs should be minimized where possible to reduce the
amount of time it takes for the Xenta 913 to detect any failed
meters.