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Publication S703E V1.1
Issue 06/09
Network), the network will continue to operate and miss out the faulty field
units.
Loop Baud Rate
: Shows the current speed selected. The speed can be 110, 300, 600, 1200,
or 2400 baud.
No. Of FCUs
: This is the total number of field units connected to the option card Port A
On Side A
and communicating via Port A.
No. Of FCUs
: This is the total number of field units connected to the option card Port B
On Side B
and communicating via Port B. Port B is only used if there is a loopback
present on the network.
Controls - Available to all user levels
Reset network
: Causes the option card to reconfigure the two-wire network. This should be
used after a loop fault has been corrected.
Network Map
The map shows the order in which the field units have been identified and found by the option
card during the last loop reconfiguration process (reset). Each time the loop is reconfigured the
map is regenerated and repopulated. Any field unit that is not powered up at the time of
reconfiguration will be absent from the map.
Position
: The position in the loop. Number 1 is nearest to Port A.
Address
: The address of the field unit.
Failures
: Shows a count of communication errors with the field unit. The count has a
range of 0 to 255, after which it rolls around to zero and it increments for
every communication error. The system will only announce a ‘Comms
failure’ when 3 successive tries have failed to locate the field unit. This
counter therefore reflects the communications condition and can be used
as an indicator of the health of the field unit to assess the probability of
failure in the future.
Type
: The type of field unit depends on the actuator and function required.
Tag Name
: The associated identification Tag assigned to this field unit.
