raja kannan


{ City } cuddalore
< Country > india
* Profession * senior engineer
User No # 113579
Total Questions Posted # 0
Total Answers Posted # 4

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Users Marked my Answers as Correct # 3
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Questions / { raja kannan }
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Answers / { raja kannan }

Question { 16583 }

What is DCS and PLC scanning time?


Answer

time taken for 1 scan sequence ::

Housekeeping -I/P update - Program execution - O/P update - Programmer windows - System communication window - Housekeeping

Is This Answer Correct ?    0 Yes 0 No

Question { OPaL, 4439 }

Where should we terminate the shield and why?


Answer

Thanks to Carl_ellis...
you almost enlightened the purpose of shielding and its function....

Is This Answer Correct ?    0 Yes 0 No


Question { IOCL, 3910 }

What is safety barrier and how it is work


Answer

safety barriers simply neglecting the spike voltages from the field that affecting the electronic I/O cards in the PLC system by fuse blow down in it
.

Is This Answer Correct ?    2 Yes 0 No

Question { Takreer, 4928 }

what is Pre- commissioning.


Answer

In addition to above ans w. r.t an instrument...

w.r.t to a system consists of PLC panel
Earthing should be done properly and proper earth resistance value...
Electronic earthing and body earthing..

UPS supply availability, all the cables.,
PLC-MCC
PLC- field
ensuring laid,terminated and loop checked okay...

PLC- SCADA PCs all Ethernet cables laid and terminated as per system architecture...

Is This Answer Correct ?    1 Yes 0 No