PLC (PROGRAMMABLE LOGIC CONTROLLER) AND DCS (DISTRIBUTED CONTROL SYSTEMS) REPAIRS

PLC and DCS?

A Programmable Logic Controller (PLC) is a miniature industrial computer (CPU) that contains the hardware and software for the automation of industrial electromechanical processes of machinery. Distributed Control System (DCS) is a computerised control system for a process or plant usually with a large number of control loops, in which autonomous controllers are distributed throughout the system, but there is central operator supervisory control.
PLC is usually used for controlling medium or large-scale applications, whereas DCS is used for controlling an entire plant.
Since their inception in 1968, Programmable Logic Controllers are now utilised in every facet of life; from controlling air conditioning systems in shopping malls to complex production lines at major car manufacturing facilities.At Axxa, we offer the most comprehensive, economical and reliable repair service for programmable logic Computer Numerical Controls (CNC), Programmable Logic Controls (PLCs), Distributed Control Systems (DCS) and programmable automation controllers (PACs) for a vast range of brands.

PLCs come with an array of benefits and advantages over non-programmable controllers:

Increased reliability
Decreased energy use
Reduced space requirement
Increased flexibility of use

You can manage multiple machines simultaneously
Higher levels of machine integration and process automation
Increased production
Lower operational costs

Multiple digital and analog inputs and outputs (I/O interface systems) can be programmedwith…

Extended temperature ranges
Immunity to electrical noise and
Resistance to vibration and impact

PLCs Run a Four-Step Operational Process in a Recurring Loop

Input Scan:Scans for all connected input devices
Program Scan: Execution of user-created program logic

Output Scan: Runs or shuts off all connected output devices
Housekeeping: communicates with programming devices and performs internal diagnostics

And you can connect a lot of things to a PLC:

All types of drives, sensors and output devices namely:
Drives
Remote I/O
Limit Switches

Sensors
Other control devices
Operator interfaces
Other PLCs

Choosing a Controller
Select the right controller for the job by determining ahead of time what you need your system to do and the specifics about the system itself.
Here is a sample of few of the questions to ask when you are deciding on a controller for your next system.
Looking for a new or an existing system? If it’s an existing one; How old is it?
What environmental conditions the system will be installed? Hot!Dusty!Noisy and full ofVibrations!
Discrete components of the system? Are they AC Devices or DC Devices?
Number of analog devices?
Any special features in the system needed? A real-time clock or high-end positioning?
Amount of memory the CPU needs to run the system efficiently?
Location of I/O devices? Local only or local and remote?
Will the Controller be communicating with other systems or networks or field devices?
Require traditional programming instructions or special instructions needed?
Each of these questions explores a distinct set of requirements to help you to the selection of right controller.

PLC Failures

In 80% of the caseswhen a PLC fails, the problem boils down to one of the following three factors:

module failure of the input/output (I/O)
problems with a field device
problems with the power supply

To function efficiently and correctly PLC system needs a signal to enact a sequence and these factors deny the PLC system to send that signal. When a problem with one of these components occurs, the issue becomes apparent with disruptions to the process at hand. In some cases, the process stops abruptly. Various issues could responsible in this situation, including the following:

Common PLC Repair Requests

No communication
No I/O indicators
Alarm indicator
I/O failure
No Power indicator
No Run Light indicator

Our test equipment can run all input-output modules through their operations, including analog input/output, digital input/output, communications, ASCII, or special function module.

Axxa technicians have vast experience in repair of the following PLC and DCS modules:

Major Brands and Products Supported by Axxa

There's a massive array of Programmable Logic Controllers on the market from leading brands such as Siemens, Allen Bradley, Schneider Electric, Mitsubishi and Omron. Axxa stocks thousands of PLC modules including I/O modules, CPU modules, racks, communications modules and power supplies.

ABB PLC Repair

ABB PLCs and DCSs comprise of a range of controllers to design and implement customer-specific and cost-effective automation solutions. The PLCs/DCSs can be combined as a tailored solution or, as standalone to complement an existing solution. DCS products provide solutions and services for continuous or batch process industries, infrastructure, energy and utilities.

Allen Bradley PLC Repair

Allen Bradley manufactures a wide range of Programmable Logic Controllers. Some famous lines include the SLC 500 range of PLCs, Control Logix, Compact Logix the Panel view series of HMIs. Be it an input module, output module, processor, stand alone or remote I/O unit,

ControLogixPLC Repair

Control Logix provides a high-performance control platform for multiple types of control...The flexible Control Logix platform permits multiple processors, networks, and I/O to be mixed without restrictions.

Compact Logix PLC Repair

Compact Logix PLCs are designed to provide mid-range application control in an easy-to-use environment. Tight integration between the programming software, controller and I/O modules reduces development time and cost at commissioning and provides cost-effective integration of a machine, safety, motion, discrete and drive capabilities in a single controller. Popular Processors and modules are:

SLC 500 PLC Repair

Bulletin 1747 SLC 500 control platform is used for a wide variety of applications. Rockwell Automation has since discontinued some of the SLC 500 Bulletin numbers: Popular modules are:

Micro Logix PLC Repair

The Allen Bradley Micro Logix 1000 start with the part number 1761. These programmable controllers are built with a processor, inputs/outputs, and a power supply. They are available in 10, 16, and 32 Input / Output DC models as well as analog models. Popular part numbers include:

Compact Logix 1769 Repair

AB Compact Logix 1968 PLC Repair
AB Compact Logix 1969 PLC Repair
AB 1969 Compac tLogix 5370 Controller Repair
AB 1969 Compact Logix I/O Module Repair

Bulletin 1771 PLC Repair, AB PLC 5 Repair

AB Bulletin 1771 Bulletin Repair
AB Bulletin 1771 universal I/O Repair

Flex I/ O 1794 PLC Repair

The Allen Bradley Flex I / O series include parts that start with the prefix 1794. This series consists of distributed I / O system that allows the user to communicate with many different network types. The communication modules can control up to 8 input/output modules.

Graphic Terminals (Panel View) Panel View Repair

Panel View graphic terminals offer rugged electronic interface solutions in a variety of sizes, operator input methods, memory options and configurations and have high score ratings for high shock, vibration, and temperature. Popular series are:

Panel View Plus Repair

The Allen Bradley Panel view Plus 6 (sizes 4 in to 15 in) and Plus 7 (size 4 in to 19 in) Displays are Operator Interface Panels that let you monitor, control, and display application status information graphically. Popular Panel view Plus Touchscreen models include:

Panel View Component Graphic Terminals Repair

Bulletin 2711C Panel View Component Graphic Terminals are panel-mount display devices that offer keypad or touch screen options for operator input. Rockwell Automation announces that as of June, 2018, Bulletin 2711C Panel View Component C200 and C300 Graphic Terminals have been discontinued and replaced by Panel View 800 Graphic Terminals. Popular models are:

GE INTELLIGENT PLATFORMS / GE FANUC PLC Repair

GE Fanuc PLCs allow total migration from the original General Electric Series Six PLC to the Series 90-30, Series 90-70 and finally to the Rx3i Rx7i Pacsystems. GE Automation & Control programming software originally known as Cimplicity, now has the name Proficy Machine Edition and PE for the HMI. Intellution FIX32, iFix and i Historian have all converted to the Proficy.

GE Fanuc PLC Repair / GE Fanuc Quick Panel Display Repair

The GE Quick Panel Total Control Legacy Touch Screen Displays are a widely used version of industrial HMI. The GE Quick panel displays allow for quick communication between your devices. The panels are compatible with most industrial equipment and can be connected using the communication ports.

HORNER PLC REPAIR

Horner Electric APG has been a GE Fanuc third party supplier for many years. Horner Electric products range from Series 90-30 to 90-70 I/O. They also provided specialty modules for GE Fanuc Genius and Field Control I/O. Horner has since moved on to manufacturing and marketing their own product lines of displays and I/O independent of GE Fanuc. Horner Electric APG products are generally made for rugged applications and have proven to be of high-quality design.

MITSUBISHI PLC REPAIR

Mitsubishi Electric launched its first compact PLC on the European market about 30 years ago. Over the years, Mitsubishi has become the world market leader in the PLC segment, with over 10 million compact controller installations to its credit. Axxa provides sales and repair services for Mitsubishi Programmable Logic Controllers for both compact PLCs and modular PLCs. Mitsubishi modular PLCs allow users to mix and select the desired combination of CPUs, communication devices, specialist control modules and discreet I/O using the same back pane.

Melsec Series PLC Repair

Mitsubishi Melsec A4 | A3 | A2 | A1 | A0 PLC Repair
Mitsubishi Melsec CPUs A4 | A3 | A2 | A1 | A0 PLC Repair
Mitsubishi Melsec System Q PLC Repair
Mitsubishi Melsec System Q CPUs PLC Repair

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MODICON PLC REPAIR / SCHNEIDER ELECTRIC PLC REPAIR / TELEMECANIQUE PLC REPAIR /AEG PLC REPAIR /SQUARE D PLC REPAIR

Modicon PLCs were the first programmable logic controllers on the market in 1968 with the release of the Modicon 048and today it offers a full line of innovative PLCs and PACs. The Modicon Family of PLCs and programmable automation controllers (PACs) stands for innovation,

Telemecanique PLC Repair / Modicon (Schneider Electric) PLC Repair

Our stock of Telemecanique PLCs incorporates new and refurbished processor modules, power supply modules, communication modules and IO modules from popular PLC ranges such as TSX 17, TSX Premium, TSX Micro & TSX 7 Series.

AEG PLC Repair

AEG A110 Repair
AEG A120 Repair
AEG A250 Repair
AEG 110 CPU 311 00 Repair
AEG 110 CPU 311 01 Repair
AEG 110 CPU 311 03 Repair
AEG 110 CPU 512 02 Repair
AEG 110 CPU 612 00 Repair
AEG AS-S908 Repair
AEG B350 Repair
AEG B351 Repair

Schneider Electric Magelis Operator Panel Repair /Modicon Magelis PLC Operator Panel Repair

Schneider Magelis HMI Terminal is used by almost all industrial organizations, as well as a wide range of other companies, to interact with their machines and optimize their industrial processes.Schneider Magelis HMI Operator Panel provides more flexibility, more communication and an easy mounting system, providing a cost-effective solution for machine builders.

OMRON PLC Repair

Omron's Sysmac PLCs are powerful enough to meet production demands yet easy to program and maintain. Axxa offers support and sales of new and obsolete