Mecc Alte MC200 Controller

Basic Information

Product: MC200 Controller (Dual Processor Architecture)

Version: Rev.132025-09-03, compatible with firmware V2.06

Usage: Main controller for generator sets, parallel connection of multiple machines, automatic switching between mains and generators, power management, cloud monitoring

Applicable to various power plant architectures such as single/multiple units, MPM/MSB/MPTM, etc

Configuration tool: BoardPrg4 (PC parameter configuration, curve editing, PLC programming)

Core technical specifications

1. Power Supply and Physics

Power supply: 12/24VDC, range 8-32VDC, reverse protection

Display: 4.3 “TFT color screen, 480 × 272

Size: 247 × 187 × 70mm, protective front panel IP55

Working temperature: -25 ℃~+60 ℃

Sampling: 10kHz, 12 bit accuracy

2. Electrical measurement

Voltage: three-phase/single-phase, 400V/100V range, true RMS TRMS

Current: External CT 1A/5A, accuracy<0.2%

Frequency: 50/60Hz, resolution 0.1Hz

Measurement: voltage, current, power, power factor, kWh, temperature, battery voltage

3. Protection accuracy

Covering ANSI/IEEE standard protection:

Overcurrent/undercurrent (50/51), overvoltage/undervoltage (27/59)

Overfrequency/underfrequency (81U/81O), reverse power, imbalance, synchronization failure

Action accuracy: ± 0.5% voltage, ± 50mHz frequency, action time ± 35ms

Overview of Hardware Interfaces (Core Terminals)

1. Digital quantity IO

Input: 18 channels of optical isolation DI, supporting co positive/co negative, expandable to 50 channels

Output: 18 channels of DO (relay+static)

Relay: 15/16（ 3A@30VDC ）17/18（ 10A@250VAC ）

Static: positive/negative output, short circuit/overcurrent protection

Support AND/OR logic, virtual DI/DO, PLC control

2. Analog IO

Input: 7-way AI (0-10V/current/resistance), supports custom curves

Output: 2-channel AO (± 10V, isolated), used for speed/voltage regulation

Scalable: Temperature and analog module

3. Battery measurement terminal

JG: mains voltage | JF: generator voltage

JE: Three phase current | JI: Fourth current (neutral/differential)

Supports star, delta, single-phase, and Aron connections

4. Communication interface

RS232、RS485（Modbus RTU）

USB (configuration/upgrade)

Ethernet 10/100M (Modbus TCP, NTP, cloud)

Dual CAN

CAN0: Expansion Module (EXBUS)

CAN1: PMCBus multi machine parallel bus

Core functions

1. Operation mode

OFF/RESET、MAN、AUTO、TEST、REMOTE START

Panel buttons: START/STOP, MAN/AUTO, MCB/MGCB close/open

2. Automatic switching of mains power (AMF)

Detect abnormal mains voltage/frequency → Start the unit → Synchronize → Close MGCB → Load

Restore mains power → Switch back to mains power → Shutdown for cooling

3. Synchronization and Parallel Connection

Automatic/manual synchronization (synchronous table, phase/voltage/frequency difference judgment)

Multi machine load sharing (active/reactive)

Support: MPM, MSB, MPTM, MSB+MSTP and other types of power stations

4. Power and load management

Base Load, Import/Export Power Settings

Peak Shaving: Peak shaving and valley filling

Load Shedding: Overload shedding (4 groups)

Start and stop units according to priority, and automatically rotate between primary and backup machines

5. Protecting Logic

Electrical: overvoltage, undervoltage, overcurrent, phase loss, reverse power, synchronization failure

System: Battery high and low voltage, board temperature too high, emergency stop, communication failure

Support the protection of override blocking (critical protection cannot be blocked)

6. PLC function

Built in soft PLC, supporting logic blocks, virtual variables, and custom logic

Can independently control IO, linkage protection, and customize processes

7. Smart Cloud platform

TLS 1.2 encrypted upload

Remote monitoring, alarm, parameters, curves

No need for a public IP address, supports internal network penetration

Operation and display interface

1. Display mode

P. XX: Parameter programming (graded password: Super User/Maker/Installer/User)

S. XX: Status (Mode, Alarm, Communication, IO)

M. XX: Electrical measurement (voltage, current, power, kWh)

B. XX: PCMBus Multi Machine Data

H. XX: Historical records (events, trends, extreme values)

L. XX: PLC Information

2. Operation permissions

4-level password protection, key parameters can only be modified with OFF/RESET

Support factory parameter recovery and password reset

Installation and wiring specifications

Installation: Panel opening 218 × 159mm, fixed with screws

Grounding: Functional grounding JB must be connected to ensure EMC

Voltage circuit: 2A slow melting fuse needs to be connected in series

Current circuit: CT strictly prohibits open circuit

Communication: CAN/RS485 twisted pair shielded wire, terminal 120 Ω resistor

Emergency stop: Connect to JJ public terminal, power outage triggers alarm

Alarm and Malfunctions (Anomalies)

1. Level 3 alarm

W (Warning): Warning, do not trip

U (Unload): Unload, skip MGCB/GCB

A (Alarm): Alarm, shutdown

2. Typical fault codes

005: GCB not disconnected

013/014: MCB/MGCB not closed

016: Overcurrent

022: Startup timeout

048: Emergency stop

051: Board temperature too high

272/273: Synchronization failed/parameter inconsistency

3xx: Analog fault

7xx: Digital quantity fault

9xx: PLC malfunction

3. Fault handling

Mute, confirm, reset, lock records

Historical records can be checked for time, events, and measurement values

Expansion module (optional)

DITEL 16IN: Extended DI

DITEL 8OUT: Extended DO

DIVIT: Expanding AI (Voltage/Current)

DANOUT: Extend AO

DITHERM/DIGRIN: Temperature measurement (thermocouple/Pt100)

​Typical application scenarios

Single Unit AMF: Automatic Switching from Mains to Generator

Multi unit parallel connection: load sharing, priority start stop

Parallel connection of mains power: peak shaving, backup, uninterrupted power supply

Pump station/machine room/data center: high reliability backup power supply

Remote unmanned operation: cloud monitoring+SMS/remote control