Interested to Buy Any Domain ? << Click Here >> for more details...
how to write program by ladder logic in case of PLC operation
- 3 Answers
- 18186 Views
- Gridco, Sofcon, I also Faced
- E-Mail Answers
Answer Posted / 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 |
Post New Answer View All Answers
Is it required to lay 2 runs of GI wires along with armoured cables from one power DB Machines of higher rating?
to hook up ten 50 amp rv pedastels at a lenth of 600 feet from the service what size will my service need to be and the size of wire will I have to run to each pedastel in series??????
How do i perform grounding of star point of Genset (400V) for making connection with step up transformer of DELTA-DELTA (400V to 20KV) ? while Genset itself has its own neutral and grounding bus bar inside genset breaker box whereas we have another neutral and grounding busbar in synchronizing panel next to genset at maximum distance of 6meter, would someone pls advice if we can only perform neutral grounding in synchronizing panel or should we ground neutral on both places inside genset breaker box and synchronizing panel.
What is the lifetime of a Thyristor? Is there a recommended lifetime for thyristors after which they should be replaced?
How to know any size of cable if there are not written on cable? Answer must be theurical not by experience.
in india per day how much power is generated including all power station
An ELHNC 80amp 240v 30mA RCD is tripping periodically, every 30 - 180 seconds is it safe to disconnect the protection circuit?
I want single line diagram for AMF & DG syncronizing panel
What will be the impact on motor performance if a LT motor is rewound with changed motor winding data as given below:- Original winding data: total 04 wires = 02 wires of 17 SWG + 02 wires of 16.5 SWG. Changed Winding data: total 03 wires of 15.5 SWG wire size Motor rating: 160KW, 740RPM, 415V, ID FAN application. Normal Running Current = 95% of FL Current.
plz send me Bhel, Mahagenco, sbi previous exam paper for electrical engineer on my email-id kambali_smita@yahoo.co.in
any one can explain what is the size of pvc,armoured, various sizes of powr cable dia?
is there any device that works properly accept relay, it may be fuse but if i want fuse of 33kv 300 amp it is avaliable, pls give me details
What are the necessary solutions needed to be carried out on a malfunctioned earthing mechanism of a VACUUM CIRCUIT BREAKER.(TAMCO)
why 1.7Uo for HV cable Hi pot test?IE standard why?
What is resolver and glass scale in CNC how they work?
