Flowserve UEX Limitorque - Manual (Page 30)

Limitorque UEX FCD LMENIM1205-03-AQ – 05/15
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9.2 Master Station III
L120 actuators equipped with Modbus can be controlled via Flowserve Limitorque’s Master Station II or III.
The next-generation master station is designed specifically for use with Limitorque’s line of DDC
(Modbus) electric actuators. The Master Station III acts as a single-source controller for up to 250
actuators.
The Master Station III is a plug-and-play solution that provides complete control and diagnostics for
Limitorque field units through a simple touch-panel operator interface. The key features of the Master
Station III include:
• A network time protocol to allow for time synchronization of alarms/diagnostic data to Host device
• Multilingual support includes English, Spanish, German, French, Italian
• Asset management and diagnostic via Bluetooth V2.0+ Enhanced Data Rate (EDR) Class 100m
• Configuration of slave register polling schedule
• Industry standard Modbus RTU, ASCI, UDPor TCP/IP protocols
• Three levels of user password protection
• 5.6” TFT touch-screen display
• E-mail notification of configurable alarm conditions
• Data/event logging
• Network control of up to 250 devices
• Front access to peripheral ports: Ethernet, USB x 2, VGA, printer/debug
• Modular hot-swappable redundant design
• Built-in secure Web server for control, monitoring and asset management capabilities
9.3 F
oundation
Fieldbus Communication
L120 actuators can be fitted with F
oundation
Fieldbus protocol that complies with the IEC 61158-2
Fieldbus H1 standard. The field unit device is able to support several topologies, such as, point-to-point,
bus with spurs, daisy chain, tree, or a combination of these. The FF device has network features that
include:
• Link Active Scheduler that controls the system
• High-speed communications at to 31.25 kbits/sec
• Publisher - subscriber communication
• One analog input block, one analog output block, two discrete output function blocks, Transducer
block, Resource block, and four discrete input function blocks
• PID (proportional integral derivative) loop control
• Device descriptions
• Configurable by user
Link Active Scheduler communication: Fieldbus segments have one active Link Active Scheduler (LAS)
at a given time, which is the bus arbiter, and does the following: