Answer Posted / carl_ellis
You'd all fail my class for failure to mention these three
things:
- A project scope document
What is to be controlled, alarmed, displayed and
communicated? What is the purpose and what are the
functional criteria for the project? What are requirements
for acceptance of the project? What limits the
dreaded 'scope creep' ("Oh, I thought it would
include . . ." or "we need to add this")
I tell my pupils that the homework problem description
constitutes the 'scope' for purposes of a class, but in the
real world it might be a 400 page scope document, but
whatever form it takes, they should never accept a verbal
description, but should insist on a written document,
because that's what defines whether their programming meets
the standard of having been done properly.
- An I/O list is absolutely essential. What are the
inputs, what are the outputs?
- The PLC's documentation
Nobody remembers all the little syntax or functional
details. It's up to the programmer to look this stuff up
because in the real world, there's no 'teacher' to answer
the question about the timer's minimum interval.
Those three things are essential. Lack of any of the 3
constitutes negligence.
Lack of mention of any of the 3 ?in the 5 answers already
posted tells me your instructors are book people, not real
world PLC programmers.
------------------------------
Carl Ellis, Measure First
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
Why are the uses 24vdc in industries
Which language of programing is popular? how can i learn it ?
draw the block diagram of a level transmitter ?
Explain operation of Haskel pump.
Why MUX JB's are using only Temperature Element in Fundation field bus?
How does a single acting, spring return ball valve actually work? Does it require continuous air supply?
What is difference of fanuc alpha series 16i and 18i controller.also what is differnce betn TC and MC controller
Which is your favourite subject & explain any one topic of it.
ORP sensor working principle?
I have 0.75mm sq multicore cable (IS type) , can use instead of same type but 1.5 sq mm cable ? Note : The distance is around about 150 meter.
What is the main difference between Cavitation and Flashing?
How r the calculation of process line mpm.
sir i m preparing for BARC but i am not getting any papers to prepare for this exam so please send me some sample papers to my i.d for the preparation of barc.
can anyone can let me know in Eurotron Micro cal 2+ calibrator in milli amps source mode we are not able to get 20 milli amps output it only produces 1.52 milli amps out, but display shows increase in milli amps , and err6 displays, let me know how to remove the err 6.
What is rang ability?
