DEIF DELOMATIC 400 Gas Engine Unit Control System

Peak regulation: Optimizing power generation output based on grid demand or economic efficiency.

Thermal Follow Control: Adjust the power output of power generation based on thermal demand (such as heating network demand) to maximize the benefits of cogeneration.

Methane value control: Engine operating parameters can be adjusted based on changes in gas quality (methane value).

Gas level/pressure control: Adjust the power generation based on the gas supply situation.

Closed loop control: controls the engine cooling circuit, emergency cooling circuit, and heating circuit; Control the gas mixing ratio; Control the exhaust bypass valve; Control the ventilation damper in the computer room; Control the intake air damper.

Chapter 2 Hardware Architecture and Technical Specifications

The DELOMATIC 400 system adopts a highly integrated modular design, consisting of only three core hardware modules, greatly simplifying spare parts inventory and maintenance complexity. All modules are installed in standard industrial chassis for high-speed and reliable data exchange through backplane bus.

2.1 PCM 4.3 Power and Control Module

PCM 4.3 is the brain and heart of the system, located on the far left side of the chassis (8TE width). It is responsible for supplying power to all modules inside the chassis and managing data exchange on the backplane. The module is equipped with a high-performance processor, running core application software and providing rich communication interfaces.

Power supply: 18... 36 Vdc, maximum 6A.

Core functions: Provide power to all modules, manage backplane data bus, and run application programs.

Processor and Operating System: The 180 MHz processor and Linux 2.6 operating system ensure real-time performance and stability of the system.

Storage: 64 MB SDRAM, 32 Kb non-volatile RAM, 16 MB FLASH (for program and data storage).

Communication interface:

3 x CAN bus: used to connect local devices such as engines and generators.

1 x RS422/485: Supports serial communication protocols such as Modbus.

1 x ARCNET: Used for high-speed connection of expansion chassis to achieve system expansion.

1 x Ethernet port (10/100 Mbit): This is the external portal of the system, supporting TCP/IP protocol, which can realize local touch screen connection, upper computer monitoring, and remote access.

1 x USB service interface (exclusively for use by DEIF personnel for debugging).

I/O: 1 digital relay output (normally open, 8A), 1 digital input (5V/7.5mA).

2.2 PCM 4.4 Distributed I/O and Fieldbus Controller

When the slots in one chassis are insufficient to accommodate all I/O modules, PCM 4.4 is used as the controller for the expansion chassis. The PCM 4.3 of the main control chassis communicates with PCM 4.4 through the high-speed ARCNET bus to achieve smooth system expansion. Its technical specifications are similar to PCM 4.3, but focus on I/O expansion and fieldbus management.

Power supply: 18... 36 Vdc, maximum 6A.

Core function: Expand the controller of the chassis and manage distributed I/O.

Interface: 3 x CAN, 1 x RS422/485, 1 x ARCNET, 1 x display port.

Storage: 2 MB RAM, 32 Kb non-volatile RAM, 1 MB FLASH.

2.3 IOM 4.2 Multifunctional I/O Module

IOM 4.2 is the "sensory and sibling" of the system, a highly flexible 40 channel multifunctional I/O module designed specifically for harsh environments. All inputs and outputs are isolated from other potentials through photoelectric isolation, ensuring the anti-interference ability and safety of the system.

Digital input (12 channels): 9... 36 Vdc or -9... -36 Vdc, impedance of approximately 2.4 k Ω, optoelectronic isolation 550 Vdc.

Frequency/digital input (4 channels): 9... 36 Vdc, impedance 2.4 k Ω, can measure frequency signals up to 20 kHz, resolution 0.8 microseconds, very suitable for high-speed signal access such as speed sensors and flow meters.

Digital output (10 channels): External power supply 9... 36 Vdc, each channel can provide up to 200 mA of source current or sink current. Equipped with short-circuit and overload protection, and sends an alarm to the main controller in case of a fault.

Temperature input (6 channels): Supports Pt100, Pt1000, and NiCr Ni thermocouples, with a temperature measurement range of -50 to 1000 ° C. Supports 2/3/4 wire connections for PT sensors and can detect open and short circuit faults. The accuracy under 4-wire connection can reach up to 0.5 ° K.

Analog input (4 channels): configurable to -20... 20 mA or -10... 10 V, 16 bit resolution, accuracy 0.5%.

Analog output (4 channels): -20... 20 mA signal, load 0... 500 Ω, 12 bit resolution, accuracy 0.5%.

Isolation: Analog input, analog output, and temperature input share the same potential, but are optically isolated from all other potentials by 550 Vac.

2.4 SCM 4.1 Measurement and Protection Module

SCM 4.1 is the "eye" of the system, a 0.5 level accuracy AC measurement and protection module. All measured values (voltage, current, frequency, power, phase angle, etc.) are transmitted in real-time to the main controller at each cycle for control logic. The integrated protection function within the module can directly control the output of two dedicated relays, ensuring the fastest and most reliable tripping of the generator in case of electrical faults.