WÄRTSILÄ WARTSILA 50DF, Product Manual

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14. Automation System
Wärtsilä Unified Controls – UNIC is a modular embedded automation system. UNIC C3 is
used for engines with electronically controlled fuel injection and has a hardwired interface for
control functions and a bus communication interface for alarm and monitoring.
14.1 UNIC C3
UNIC C3 is a fully embedded and distributed engine management system, which handles all
control functions on the engine; for example start sequencing, start blocking, fuel injection,
cylinder balancing, knock control, speed control, load sharing, normal stops and safety
shutdowns.
The distributed modules communicate over a CAN-bus. CAN is a communication bus
specifically developed for compact local networks, where high speed data transfer and safety
are of utmost importance.
The CAN-bus and the power supply to each module are both physically doubled on the engine
for full redundancy.
Control signals to/from external systems are hardwired to the terminals in the main cabinet
on the engine. Process data for alarm and monitoring are communicated over a Modbus TCP
connection to external systems.
Fig 14-1 Architecture of UNIC C3
Short explanation of the modules used in the system:
Main Control Module. Handles all strategic control functions (such as start/stop sequen-
cing and speed/load control) of the engine. MCM
Engine Safety Module handles fundamental engine safety, for example shutdown due
to overspeed or low lubricating oil pressure. ESM
Local Control Panel is equipped with push buttons and switches for local engine control,
as well as indication of running hours and safety-critical operating parameters. LCP
Wärtsilä 50DF Product Guide - a16 - 9 September 2016 14-1
14. Automation System Wärtsilä 50DF Product Guide