Wartsila 31, Product Manual

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13. Automation System
Wärtsilä Unified Controls - UNIC 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 an internal communication bus.
The power supply to each module is 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.
13.1 Technical data and system overview
13.1.1 Ingress protection
The ingress protection class of the system is IP54.
13.1.2 Ambient temp for automation system
The system design and implementation of the engine allows for an ambient engine room
temperature of 55°C.
Single components such as electronic modules have a temperature rating not less than 70°C.
Short explanation of the modules used in the system:
Communication Module. Handles strategic control functions (such as start/stop sequen-
cing and speed/load control, i.e. "speed governing") of the engine.
The communication modules handle engine internal and external communication, as
well as hardwired external interfaces. COM
Engine Safety Module handles fundamental engine safety, for example shutdown due
to overspeed or low lubricating oil pressure. ESM
The local display unit (local operator panel) shows all engine measurements (e.g. tem-
peratures and pressures) and provides various engine status indications as well as an
event history. LDU
Input/Output Module handles measurements and limited control functions in a specific
area on the engine. IOM
Cylinder Control Module handles fuel injection control and local measurements for the
cylinders. CCM
The above equipment and instrumentation are prewired on the engine.
13.1.3 Local operator panel
●
The Local operator panel (LOP) consist of a display unit with touch screen and pushbuttons
as well as an emergency stop button built on the engine.
The local display unit shows all engine measurements (e.g. temperatures and pressures)
and provides various engine status indications as well as an event history
The following control functions are available:
- Local/remote control selection
Wärtsilä 31 Product Guide - a1 - 18 October 2016 13-1
13. Automation System Wärtsilä 31 Product Guide