Senior PLC / SCADA Engineer Wanted in UK

We are currently looking for Senior PLC / SCADA / HMI Engineers to be based in the UK (contract & permanent roles). The Senior Control Systems Engineer possesses and demonstrates a diverse set of technical skills and product knowledge. They have the ability to work on both hardware and software across various platforms. You will possess at least 3 years experience of engineering design within the Control and Instrumentation environment with ever increasing levels of responsibility.

You will be degree qualified in a related technical discipline or equivalent work experience. Ideally should also hold (or be prepared to take) an offshore medical and survival certificate. You will have proven track record in engineering, commissioning, trouble-shooting, maintaining and upgrading complex control and safety systems (PLC - Siemens, Allen Bradley, GE Fanuc, Mitsubishi; SCADA - InTouch, RSView, iFix / Fix32, WinCC; Fire & Gas and ESD). Experience in the Oil & Gas industry is preferred. Candidates must be prepared to travel to client sites (both in the UK and abroad) as required. There may be an element of offshore working with this role. Please apply for more information. Longbridge Technology is acting as a Recruitment Agency with regards to this vacancy.


Status:Staff
Desired Skills/Experience:Siemens S5/S7, Allen Bradley, RSLogix, Controllogix, Compactlogix, GE Fanuc, Mitsubishi, InTouch, RSView, iFix / Fix32, WinCC, WinCC Flexible, Fire & Gas, ESD, ArchestrA, Flow Metering
Minimum Experience:3 years
Location:UK, UNITED KINGDOM
Onshore:
Offshore:
Remuneration:35000 - 50000 UK Pounds/year
Advert Published:28 Oct 2011
Expiry date:11 Nov 2011
OilCareers Ref. No.:J595243
Work Permit Requirements:EUROPEAN UNION
(Applications will only be considered from people who are authorised to work in this location by being a national of that country or region, or by holding a valid work permit.)

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Distributed Control System - Architecture Part 2

This part is the continuation of my previous post on Distributed Control System - Architecture. The figure below shows a generalized architecture of disturbed control system.

The explanation of each block is given below:


Local control unit (LCU)

The smallest collection of hardware in the system that can do closed – loop control. The LCU interfaces directly to the process.

Low level human interface (LLHI)

A device that allows the operator or instrument engineer to interact with the local control unit (e.g to change set points, control nodes, control configuration or tunning parameters) using a direct connection. LLHI’s can also interface directly to the process. Operator oriented hardware at this level is called low level operator interface, instrument engineer – orientated hardware is called a low level operator interface, instrument engineering interface.

Data Input / output unit (DI/OU)

A device that interfaces to the process solely for the purpose of acquiring or outputting data. It performs no control function.


High level human interface (HLHI)

A collection of hardware that perform functions similar to the LLHI but with increased capability and user friendliness. It interfaces to other devices only over the shared communication fatuities. Operator – oriented hardware at this level is called high level operator interface, instrument engineer oriented hardware is called high level engineering interface.

High level computing device (HLCD)

A collection of micro processor based hardware that performs plant management functions traditionally performed by a plant computer. It interfaces to other devices only other the shared communication facilities.

Computer interface devices (CID)

A collection of hardware that allows an external generate purpose computer to interact with other devices in the distributed control system using the shared communication facilities.

Shared communication facilities

One or more levels of communication hardware and association software that allows the sharing of data among all devices in the distributed system should communicate channels between specific devices as between hardware elements within a device.

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Instrumentation and Control Interview Questions and Answers

I hope it is time for the final year students to prepare for placement and this post is to share Mr.Patel's Interview experience.

If you are looking for the Instrumentation interview question and answers, you can navigate to the bottom section of the post.

ESSAR instrumentation paper on 18th may, Gandhi nagar.


Hello friend, my name chandresh patel from government engineering college gandhinagar, sec-28 & want to share my experience about selection procedure of ESSAR.


Eligibility:-
60% aggregate marks.

Selection process:-

Online written test:-

4 sections:- Quantitative aptitude, Reasoning, English, Technical.

It is the most important round of the selection process. The first three sections are easy & if you prepare well for aptitude from R S Agrwal. Then it won’t be a problem. But the time is very less so u must be fast.

For the technical section, they asked basic question from the whole instrumentation. for this Section u must prepare well. They asked from all the subject of previous semester. So the basic fundamental must be clear.

Some of questions like....
  1. Range of any specific type thermocouple.
  2. About plc & dcs.
  3. Digital technology.(flip-flop etc...)
  4. Transducers & their principles.
  5. op-amp based question.
  6. 4-20ma related questions.
After this written section the result was declared & fortunately i was selected for group discussion.

Group discussion:
This part is put just for formality. No one was eliminated from this round.

Personal interview:-
There were two sections in personal interview.
  1. Technical.
  2. HR.

In technical, they asked me about myself, and then start some technical question related to plc & dcs. Control valves, three element boiler control, and cascade, discuss my 8th semester project. The sir was very friendly & asks me about my interest & it was great experience. The main thing is your confidence & must be confident.

In HR, they asked me very simple question like why do u want to join essar? , family background, why don’t u want to study further. just answer honestly. Don’t be over smart. After 15 days they send result to out college TPO. & i was selected.

Best of luck............

Download the eBook to know about the instrumentation  interview question and answers asked in the placement time click here

You can contact me through the below comments box, if you want any help in interview questions and answers.

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Distributed Control System - Architecture

This post is a continuation of my previous post on Distributed Control System

The structure of a DCS is often referred to as its architecture. In terms of functional modules, DCS’s from various vendors have lot in same. The image below gives the architecture of generalized DCS. The following major inter connected technologies have been used for distributed control.

  1. Shared bus
  2. Ring and
  3. Hierarchical.
In shared bus systems the connected processors communicated over a common channel using time-sharing, thus allowing attached computers to transmit information in short-duration, high speed bursts.


A ring system consists of high speed, unidirectional digital communication channel (e.g. fiber optics link, twisted-wire pair, etc.) which’s arranged as a closed loop or ring microcomputers are attached to the ring by ring – interface units.

A hierarchical system consists of number of minicomputers or microcomputers inter connected in a tree structure.

The data collection and direct – control activities are handled at the lowest level, where as data processing, summary processing and co ordination are performed at higher levels.

The proper selection of architecture including software and type of processors greatly influences the performance of the distributed control system. Variations in the architecture are determined by several factors, such as memory size and rate, data paths between computers, usage flow control and error checking and recovery.

In the next post, I will discuss about the distributed control system architecture in depth.

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