14. Automation system
14.1 Automation system level 1
The equipment on the engine included in automation system level 1 handles critical safety functions, some basic signal conversion and power distribution on the engine. The engine is equipped with push buttons for local operation and local display of the most important operating parameters. Speed control can also be integrated in the system on the engine. All terminals for signals to/from external systems are located in the main cabinet on the engine.
Figure 14.1Architecture of automation system level 1
Equipment in the main cabinet on the engine:
Main Control Module. In automation system level 1 this module is used for speed/load control (unless an external speed control unit is specified).
MCM
Engine Safety Module. Handles fundamental engine safety, for example shutdown due to overspeed, low lubricating oil pressure, or oil mist in crankcase. The safety module is the interface to the shut-down devices on the engine for all other control equipment.
ESM
Local Control Panel. Equipped with push buttons and switches for local engine control, as well as a graphical panel with indication of the most important operating parameters.
LCP
Power Distribution Module. Handles fusing, power distribution, earth fault monitoring and EMC fil-tration in the system. It provides two fully redundant 24 VDC supplies to all modules, sensors and control devices.
PDM
14. Automation system
Equipment locally on the engine
• Sensors
• Solenoids
• Actuators
The above equipment is prewired to the main cabinet on the engine. The ingress protection class is IP54.
External equipment
Start/stop & control system
The equipment listed below is mounted in a steel sheet cabinet for bulkhead mounting, protection class IP44.
• Programmable logic controller for start blockings, slow turning, wastegate control etc.
• Two redundant power supply converters/isolators
• Fuses and terminals
• External speed control unit, if applicable
• Display unit
14.1.1 Local control panel (LCP)
Figure 14.2Local control panel
Operational functions available at the LCP:
• Local start
14. Automation system
• Local stop
• Local emergency stop
• Local shutdown reset
• Exhaust gas temperature selector switch
• Local mode selector switch with positions: blow, blocked, local and remote.
- Local: Engine start and stop can be done only at the local control panel.
- Remote: Engine can be started and stopped only remotely.
- Blow: In this position it is possible to perform a “blow” (an engine rotation check with indicator valves open and disabled fuel injection) by the start button.
- Blocked: Normal start of the engine is inhibited.
Parameters indicated at the LCP
• Engine speed
• Turbocharger speed
• Hour counter
• Fuel oil pressure
• Lubricating oil pressure
• Starting air pressure
• Control air pressure
• Charge air pressure
• LT cooling water pressure
• HT cooling water pressure
• HT cooling water temperature
• Exhaust gas temperature after each cylinder, before and after the turbocharger
14.1.2 Engine safety system
The engine safety system is based on hardwired logic with redundant design for safety-critical functions.
The engine safety module handles fundamental safety functions, for example overspeed protection. It is also the interface to the shutdown devices on the engine for all other parts of the control system.
Main features:
• Redundant design for power supply, speed inputs and stop solenoid control
• Fault detection on sensors, solenoids and wires
• Led indication of status and detected faults
• Digital status outputs
• Shutdown latching and reset
• Shutdown pre-warning
• Shutdown override (configuration depending on application)
• Analogue outputs for engine speed and turbocharger speed
• Adjustable speed switches
14.1.3 Engine start/stop & control system
The main features of the engine start/stop & control system are:
• Steel sheet cabinet for bulkhead mounting, protection class IP44
• Programmable logic controller for the main functions:
14. Automation system
- Start blocking
- Slowturning and start sequence
- Control of LT-thermostatic valve, charge air bypass and exhaust gas wastegate
- Control of pre-lubricating pump, cooling water pre-heater pump and standby pumps (when applicable) through external motor starters
• Display unit in the cabinet door showing the status of startblocking signals, shutdown reasons and control function parameters. Interface for adjustment of control parameters.
• Conversion to 24 VDC, isolation from other DC systems onboard, distribution of 2 x 24 VDC internally in the cabinet and to the engine mounted equipment, as well as bumpless switching between power supplies. At least one of the two incoming supplies must be connected to a UPS.
• Power supply from ship's system:
- Supply 1: 230 VAC / abt. 400 W - Supply 2: 24 VDC / abt. 200 W UPS Figure 14.3Front layout of the cabinet
14. Automation system
14.1.4 Cabling and system overview
The following figure and table show typical system- and cable interface overview for the engine in mechan-ical propulsion and generating set applications.
Figure 14.4Automation system level 1 overview
Table 14.1 Typical amount of cables of the automation system level 1
Cable types (typical) From <=> To
Cable
18 x 2 x 0.75 mm2 11 x 2 x 0.75 mm2 9 x 2 x 0.75 mm2 6 x 2 x 0.75 mm2 4 x 2 x 0.75 mm2 4 x 2 x 0.75 mm2 21 x 0.75 mm2 12 x 0.75 mm2 10 x 0.75 mm2 Engine <=> alarm & monitoring system
A
1 x 2 x 0.75 mm2 10 x 0.75 mm2
4 x 0.75 mm2 Engine <=> propulsion control system
Engine <=> power management system / main switchboard B
3 x 2 x 0.75 mm2 22 x 0.75 mm2 Engine start/stop & control system <=> alarm & monitoring system
C
4 x 1.5 mm2(power supply) 12 x 2 x 0.75 mm2
1 x 2 x 0.75 mm2 26 x 0.75 mm2 13 x 0.75 mm2 6 x 1.5 mm2 8 x 0.75 mm2
3 x 1.5 mm2 Engine <=> engine start/stop & control system
D
1 x 2 x 0.75 mm2 14 x 0.75 mm2
2 x 0.75 mm2 Engine start/stop & control system <=> propulsion control system
Engine start/stop & control system <=> power management system / main switchboard
E
NOTE! Cable types and grouping of signals in different cables will differ depending on installation and cylinder configuration.
Power supply requirements are specified in section Engine start/stop and control system.
14. Automation system
Figure 14.5Signal overview (Main engine)
Figure 14.6Signal overview (Generating set)
14. Automation system