ABB Ability ™ Symphony ® Plus MR series (Melody Rack) control system

ABB Ability ™  Symphony ®  Plus MR series (Melody Rack) control system

Core positioning and value of the product

ABB Ability ™  Symphony ®  The Plus MR series (also known as Melody Rack) is a modular, high availability, and easy to configure efficient control system, mainly aimed at industrial fields such as power generation and water treatment. Its core goal is to help users improve production control efficiency, maximize process availability, reduce maintenance costs, and support rapid response to market demand changes, adapting to automation tasks in factories of different sizes through flexible architecture and powerful functions.

Traditional production facilities require the maintenance of multiple independent controller subsystems, while the MR series integrates multifunctional capabilities through an extensible controller platform that combines openness and high availability, avoiding compatibility issues with multiple systems, reducing overall operational complexity, and bringing higher returns to enterprise assets.

Core functions and technical features

1. Flexible hardware architecture and I/O system

(1) Modular assembly and installation method

Deployment form: Supports distributed DIN rail installation, can be combined with local I/O or remote I/O (such as ABB S800, S900 series and other PROFIBUS remote I/O), suitable for centralized or decentralized system layouts;

Installation compatibility: Provides three installation methods: cabinet installation, DIN rail installation, and 19 inch rack installation, which can be combined and used in the same project to facilitate the upgrading and renovation of existing facilities;

Space optimization: The high packaging density of local I/O modules can minimize installation space and reduce cabinet occupancy costs.

(2) Comprehensive I/O types and functions

The MR series provides a wide range of local I/O modules, covering common signal requirements in industrial scenarios, and supporting intrinsic safety (Ex i) design and HART communication. The specific types and features are as follows:

Specific classification of I/O module types and core functions

Analog Input (CAI) Ex version/non Ex version integrated transmitter power supply, 1ms resolution timestamp, signal monitoring and filtering, supports equal use of HART variables and analog signals

Temperature Input (CTI) - Accurately collects temperature signals and adapts to different industrial temperature measurement scenarios

Analog output (CAO) Ex version/non Ex version provides continuous control signals and supports preset value output under fault conditions

Digital input (CBI) Ex/non Ex version event detection and alarm generation, 1ms timestamp, compatible with switch signal acquisition

Digital Output (CBO) - controls external actuators (such as solenoid valves) and supports redundant configurations to enhance availability

Control module (CAC/CBC) CAC 10-P (closed-loop output), CBC 11-P (drive control) CAC is used for continuous controllers, PI step controllers, etc; CBC is used for switch actuators, motor drives, etc., and can operate independently of the controller

Frequency Input (CFI) - collects frequency signals, adapts to monitoring parameters such as speed and flow rate

Serial Communication Interface (CCF) - expands external communication such as Modbus and PROFIBUS, supporting third-party device access

(3) I/O redundancy and maintenance convenience

Redundant design: Supports I/O module redundancy, communication bus (Fnet, high-speed serial bus) redundancy, and power module can also choose redundant configuration to ensure no single point of failure;

Online maintenance: By using dedicated wiring terminal units, it is possible to replace faulty I/O modules without disconnecting on-site cables and without interrupting the production process;

Online expansion: I/O modules can be reconfigured or added during normal system operation without downtime, ensuring process continuity.

High performance controllers and control capabilities

(1) Core parameters and functions of the controller

The MR series controller (represented by PM877) has powerful computing and control capabilities, suitable for complex industrial scenarios, and key features include:

I/O processing capability: A single controller can handle local I/O (2000 analog/digital points)+PROFIBUS DP remote I/O (6000 analog/digital points), totaling 8000 I/O points;

Control function coverage: supports open-loop/closed-loop control, sequential control, batch control, and advanced control (such as formula management based on S88 standard and fault handling based on NAMUR standard), meeting complex control strategies in fields such as power generation and water treatment;

Performance: Equipped with a real-time multitasking operating system, supporting 16 different cycle times, with a time synchronization accuracy of 0.5ms between controllers and a sequence of events (SOE) timestamp resolution of 1ms, ensuring real-time performance and data accuracy;

Diagnosis and safety: Regularly check the integrity of hardware and firmware, and automatically report abnormal states to HMI or alarm system; Compliant with network security standards (DSAC), the battery free design reduces maintenance costs, and the performance is improved compared to the previous generation product (CMC 50/60), with power consumption reduced by 50% compared to PM875/876.