Product manual

B Protocols TAC Xenta Server – Gateway, Technical Manual
168 (184) Schneider Electric Buildings AB, June 2011
04-00124-06-en
Interface Status Signals
The Meter Bus interface generates a number of general and meter spe-
cific communication status values, as described below.
• ComsFail – Flags a complete communications failure. Activated
only if communications have failed to all meters on the M-Bus.
• MetersFail – Flags if communications have failed to one or more
meters on the M-Bus. Will always show FAILED before Coms-
Fail.
• IsHeldOff – Flags if meter polling is temporarily suspended
because an external master’s communications has been detected
on the M-Bus network.
• online – Flags ONLINE during normal network communications,
and will change to OFFLINE only if communication has failed to
one or more meters on the M-Bus. An OFFLINE condition nor-
mally indicates incorrect communication property settings, or
faulty wiring of the network between the Xenta 913 and one or
more meters on the M-Bus.