Answer / gajanand solanki

For Programming a PLC
1.First you should have PC . Then Appropriate software
Then Appropriate cable may be RS232,USB or Ethernet net
if you PLC Support that.
2.You should have knowledge of that software like
Programming in Ladder,SFC or Instruction List.

Answer / akash

1)should know the application of program properly
2)A pc with appropriate software.
3)should know any programming language (LAD,STL)
4)should know all inputs and outputs properly

Answer / neeraj sharma

1. should have a pc
2. should have a plc
3. should have network such as RS232 (Allen Bradley)
4. should have communication cable to communicate b/w plc & pc
ex. PM02 , CP3 etc
5. should have driver software
6. should have knowledge of programming (ladder logic , FBD , Structral text)

Answer / 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

Answer / parmar jayesh

plc program is reqired for an appropriate output from an
specific input.

Answer / kailash luhar

input module, CPU CPU, POWER SUPPLY, outputn module. leader
logic.

why 4-20 mA in covection system?

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