Flowserve UEX Limitorque - Manual (Page 31)

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Limitorque UEX FCD LMENIM1205-03-AQ – 05/15
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• Recognizes and adds new devices to the link
• Removes non-responsive devices from the link
• Schedules control activity in, and communication activity between, devices
• Regularly polls devices for process data
• Distributes a priority-driven token to devices for unscheduled transmissions
9.4 PROFIBUS DP V1 Communication
L120 actuators can be fitted with Profibus DP_V1 protocol field units that comply with EN50170
Fieldbus Standard for RS-485 communications. The device supports several topologies, such as,
point-to-point, bus with spurs, daisy chain, tree, or a combination of these. The PB device has network
features that include:
• High-speed communications up to 1.5 m/bits/s
• Master-to-slave communication
• One analog input block, one analog output block, two discrete output function blocks, Transducer
block, Physical block, and four discrete input function blocks
• Device descriptions configurable by user
High-Speed Data Exchange – Startup Sequence
• Power ON / Reset – Power On / Reset of master or slave
• Parameterization – download of parameters into field device (selected during configuration by the
user)
• I/O Configuration – download of I/O configuration into the field device (selected during configuration
by the user)
• Data Exchange – cyclic data exchange (I/O Data) and field device reports diagnostics
• Also supports Profibus_DP redundancy
9.5 PROFIBUS PA Communication
A Profibus PA protocol is available and complies with EN50170 Fieldbus Standard and Fieldbus physical
layer per IEC 61158-2 for communications. The device supports several topologies, such as point-to-
point, bus with spurs, daisy chain, tree, or a combination of these. The PB device has network features
that include:
• High-speed communications at to 31.25 kbits/s with Manchester coding
• Master-to-slave communication
• Bus powered for 9-32 VDC and 15 mA per actuator
• Stand-by communication channel
• One analog in and one analog out, four digital input and up to eight digital output function blocks
• Device descriptions configurable by user