how to write program by ladder logic in case of PLC operation
Answers were Sorted based on User's Feedback
Answer / muhammad uzair
Ladder Logic is simply an interpretation of OR, AND, NOR,
XOR, XNOR, NAND functions. First you solve the problem
using the above functions & then transform the symbols into
those of ladder logic.
Each rung of ladder language typically has one coil at the
far right. Some manufacturers may allow more than one
output coil on a rung.
--( )-- a regular coil, true when its rung is true
--(\)-- a "not" coil, false when its rung is true
--[ ]-- A regular contact, true when its coil is true
(normally false)
--[\]-- A "not" contact, false when its coil is true
(normally true)
The "coil" (output of a rung) may represent a physical
output which operates some device connected to the
programmable controller, or may represent an internal
storage bit for use elsewhere in the program.
Example:
S = X AND ( Y OR Z )
----[ ]---------|--[ ]--|------( )--
X | Y | S
| |
|--[ ]--|
Z
Is This Answer Correct ? | 72 Yes | 14 No |
Answer / d.balaji
hi. if u know the true logic for all the gates like AND,OR
etc,. its easy to write a program by using that gates.i
suggest u please the site www.abb.com this will give what
ever information u want,.
Is This Answer Correct ? | 19 Yes | 13 No |
What is stepper motor?
An engineer measures the direct current resistance of a transformer using ohm meter. When he/she takes out one of the leads of the meter, spark comes.. Why ?? This effect is known as...
what type of insulation is used for over head lines?
why there is a humming noise in transformer
Dear, How much ph is maintained of water electrolite used in lrs for slipring induction motor ?
what is the basic paramter to set a electric drive
We know no of electron and proton in atom but how many Neutron are thire in an atom ?
what are the main hormonics in ac?
In Fluorescent tube there is a writing like 6500k . what this 6500k represents?
Is there any question in the name of Static Switch in UPS??
What is difference between 220v/50Hz & 120V/60Hz?
what is cathodic protection and why it use in industries?