Wärtsilä 32 Product Guide

Wärtsilä 32 - Product Guide
14. Automation System
14. Automation System
Wärtsilä Unified Controls – UNIC is a modular embedded automation system. UNIC C2 has a hardwired
interface for control functions and a bus communication interface for alarm and monitoring.
14.1 UNIC C2
UNIC C2 is a fully embedded and distributed engine management system, which handles all control functions
on the engine; for example start sequencing, start blocking, 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.
Figure 14.1 Architecture of UNIC C2
Short explanation of the modules used in the system:
MCM
ESM
LCP
LDU
Main Control Module. Handles all strategic control functions (such as start/stop sequencing
and speed/load control) of the engine.
Engine Safety Module handles fundamental engine safety, for example shutdown due to
overspeed or low lubricating oil pressure. The safety module is the interface to the shutdown
devices and backup instruments.
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.
Local Display Unit offers a set of menus for retrieval and graphical display of operating
data, calculated data and event history. The module also handles communication with
external systems over Modbus TCP.
136 Product Guide W32 - 1/2013