Every automation system targets the safe and sound continuous operation with economic design.
Wartsila UNIC automation system
Wartsila UNIC automation system consists of the following major parts:
- Local Control Panel (LCP): Contains push buttons for local engine control, as well as two graphical displays.
- Main Control Module (MCM): Handles all the start/stop management and speed/load control functions of the engine. This module is an optional for engines having mechanical governors.
- Engine Safety Module (ESM): Handles fundamental engine safety, and is the interface to the shutdown devices and some local instruments.
- Power Distribution Module (PDM): Handles fusing, power distribution, earth fault monitoring and EMC filtration in the system. It provides two fully redundant 24 VDC supplies to all modules,sensors and control devices. Common rail engines also have two redundant 110 VDC supplies for the injector drivers.
Main Control Module in Wartsila Engine automation system.
MCM Placement in Engine:
Directly mounted on the engine.Generally placed in a box called junction box beside A1 “cylinder head ” of engine.
Function of MCM:
The main function of MCM is to control the speed of engine. It has also other functions.
1- As Speed controller (Main function):
To control the speed of the engine there are two speed sensor mounted in engine monitoring the engine speed. The out of this two engine is compared always for safety.
Out put from the speed sensor is processed with the reference speed value and signal is set to fuel actuator to control fuel to control speed. As speed is directly controlled by the fuel.
2- Engine operation:
Engine start, stop, loading, unloading etc also controls by MCM .
WOIS and WISE in Wartsila system.
The Wärtsilä Operator’s Interface System (WOIS) provides a user interface to the PLC system. It consists of a computer with the necessary software, connected to the control system of the power plant.
The WOIS workstation is mainly used for monitoring the generating sets and the auxiliary systems, while most of the operations are performed at the control panels.
The Wärtsilä Information System Environment (WISE) is used for follow-up of the power production and the engine condition, as well as for long-term diagnostics of the engine.
The WISE calculates and saves important measurement values, and allows the operator to view and print reports. The WISE gets the information from the WOIS.