ABB Ability™ Symphony® Plus MR Series (Melody Rack) MR Series controllers

Wide range of intelligent I/Os, standard interfaces and libraries

Scalable control stations

MR Series control stations are conveniently

set up according to project needs and are made

up of modular controllers and I/Os. Depending on

the scope of the automation task, the controller

is extended with I/O modules or communication interfaces.

The controllers are connected via the control

network to ensure reliable, high speed and

system wide real-time signal exchange with

other control stations, with S+ Operations,

with system level applications and with

S+ Engineering for Melody.

Each node on the control network operates

autonomously. Acting as its own communication

manager, the system requires no traffic directors.

The controller’s associated I/O modules are

connected using the high-speed redundant serial

field network or PROFIBUS DP (DPV1 as well as DPV2).

MR Series controllers

Melody controllers are designed for maximum

computing power and modular scalability.

Each controller can handle up to 2.000 analog

and/or digital I/O points from the local I/O, and

additionally 6.000 analog and/or digital I/O

points connected via PROFIBUS DP. In addition

to the standard tasks such as signal processing,

loop and logic control, the MR Series controller

also performs complex computations such as

sequential, batch and advanced controls.

Diagnostic routines periodically check the

hardware and firmware integrity. Any abnormal

conditions are automatically routed to the HMI

or other alarm or message collecting software.

The redundant design provides an automatic

one- to-one backup, thus ensuring high system

availability. If the primary controller is faulty, the

hot standby controller, executing the same

control strategy and process data, immediately takes over control.

MR Series controller key features include:

• Large variety of powerful functions available in tested libraries

• Easy configuration, service and commissioning with S+ Engineering

• Inherent redundancy without configuration/wiring costs

• Real-time multitasking operating system

• Up to 16 different cycle times

• Comprehensive monitoring and diagnostic functions

• Interface for radio clock connection

• Bumpless downloadable firmware and application programs (no EPROMs)

• Cyber security proven

• PM 877 without battery

The range of available function blocks extends

from simple control and individual drive functions

to complex recipes based on S88 and NAMUR

using sequential function charts based on IEC61131-3.

Function blocks may also be used to set up

customer-specific libraries in S+ Engineering for Melody.