Bernard INTELLIBUS FF - Display Indication of Fieldbus Communication Status; Emergency Supply; 4 Fundational Fieldbus Technical Overview; Foundation Fieldbus Communication

INTELLIBUS
Number : NR 1157
Revision : B
Page 6/19
Instructions for start-up
The default setting is stayput.
Also in case of loss of communication all controls are reset. For example if the
auxiliary control AUX1 is configured "Local control inhibit" when communication is
lost, local controls are available again.
Cmd by fieldbus: The default setting is Yes. If No is selected then no command is
taken into account through the fieldbus. Only indications are transmitted.
3.5 Display indication of fieldbus communication status
An indication of the fieldbus communication status is available on the actuator
display.
No data exchange (empty square)
Data exchange (rotating triangle)
Intellibus module fault (blinking cross)
3.6 Emergency supply
The actuator Intelli+ is normally supplied by the mains but in case of loss of power
supply an emergency supply could be used to continue to communicate through the
fieldbus. This emergency supply needs 24V DC 4W.
The optional extra battery is also an alternative to be able to read the display during
power off period but also to update the position in case of a change. The right
position is then updated through the fieldbus communication.
4 FUNDATIONAL FIELDBUS TECHNICAL OVERVIEW
4.1 Foundation Fieldbus communication
4.1.1 Link Active Scheduler
The INTELLIBUS FF interface, can communicate with Distributed Control System
(DCS), Programming Logic Controller (PLC), Personnal Computer (PC), or other
devices from various suppliers equipped with Foundation Fieldbus.
Communication on the Fieldbus is managed by a Link Active Scheduler (LAS). The
LAS has a list of the devices connected and sends cyclic messages to all devices.
The LAS sends also a Pass Token message that allows an actuator to transmit
unscheduled messages
Any Link Master device may becoming a LAS
The Fieldbus may have multiple Link Masters. If the current LAS fails, one of the Link
Masters will become the LAS and the operation fieldbus will continue.
The actuator with INTELLIBUS FF could be a LAS.
Actuator address: There is no address configuration to the actuator level. This is
performed automatically by the Link Active Scheduler (LAS). New actuators may be
added to the fieldbus at any time. The LAS periodically sends Probe Node (PN)
messages to the addresses not in the live list. If an actuator is present at the
addresses and receives the PN, immediately returns a Probe Response message. If
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