PLC ladder Program

Hani Abdullah

Member
H
Join Date
Jan 2014
Location
Rawalpindi
Posts
41
Hello Everyone. I have this question as my project with which i am having trouble . I just need guidance that how to start doing this. I am totally confused in it and don't know how to work with it this time. Please help me

qs.jpg
 
Hints:

A problem like this requires you to think of states / sequence. Start with defining states then moves on to define what cause the system to move from one state to another.
 
I can start the state definition for you, you can finish it..

Let's call it state A as the initial condition and B for the second condition:

so

[A] = all lights off
= Light 1 ON, all other off
[C] = ??

get the idea?
 
it is a stepsequence.
step 0 is start, is activated when plc starts. (find the onetimecontact)
step1 gets active after two transitions: when switch is on, and when switch is off again.
 
Because you cannot use timers or counters, you need a substitute for a counter. Use a "word address" N7:0 as a Step or Position Pointer. Each time your Step Switch I:000/3 goes ON, ADD 1 to N7:0. (Math instructions were not forbidden)!

Use comparison instructions (<, =, >, LIM) to turn on the Pilot Lights when N7:0 = Step Number.

When I:000/3 is ON, use a One-Shot ONS B3:0/0, and Add 1 to N7:0
When N7:0 = 1, OTE O:000/05
When N7:0 = 2, OTE O:000/04
When N7:0 = 3, OTE O:000/03
When N7:0 = 4, OTE O:000/02
When N7:0 = 5, Do Nothing: OTE B3:0/1
When N7:0 = 6 OR I:000/06 is ON, Move 0 to N7:0
 
Last edited:
I cannot open your file. I think my Internet Explorer is too old. If you follow my directions in Post #9 for using a "word counter" step by step, you should have Rungs 000 to 006, and it does work.

Lights but No Counters- Rungs 000 to 002.JPG
 
Last edited:
Hani,
I am sorry, but your logic will not work. First, your instuctions say that you only have TWO switches, I:000/03 STEP, and I:000/06 RESET. You have used 3 Inputs that your problem did not allow. Go back to my Post #9 and #12 and study the logic and duplicate that in your program.

Can you please upload it again? Its not showing the whole image
Click to expand...
No, and I did not mean to show the whole image. I think that you should be able to figure out the rest for yourself, if you read Post #9 again. There are only 3 more rungs (000 to 006).

Here is the picture of it sir. Its in RsLogix5
Click to expand...
RSLogix5 has some differences from RSLogix500. In RSLogix 5, for your Rung 000, use a ONS instruction, address B3:0/0.

Well I will be nice and have pity on the sad, helpless, hopeless students.:cry: Here are the last 2 rungs in RSLogix5.

Lights but No Counters- Rungs 005 to 006.JPG
 
Last edited:

Similar Topics

M
PLC ladder diagram program
HEY there, could someone please answer this Design a plc ladder diagram to control a production line of filling bottles with two conveyors upper...
Replies
6
Views
2,270
daba
D
T
tp program the gsm modem which is connected to PLC using ladder programming..help plz
Dear All, i am a computer engineering student and this is my last semester. part of my design project requires me to connect gsm modem with plc...
Replies
5
Views
7,457
Stephen Luft
Stephen Luft
V
Could you help me? Convert STL to Ladder Program with Omron PLC
I have no software to programming. My PLC rack contains CPU200H/SP001/OC225/OC225/OC225/OC225/ID212/ID212/ID212/.I have a console programming and...
Replies
14
Views
11,401
jvdcande
jvdcande
R
Using Graphset to develop a ladder PLC program
Hello, I am trying to find a good source to learn about Graphset. I am not sure if I am spelling this correctly. I have been told that it is...
Replies
1
Views
10,950
rsdoran
rsdoran
A
SEW IPOS Drive Assembler Code conversion to PLC Ladder Logic
I have a machine which is undergoing upgradation. As part of the process two SEW drives are being replaced., existing Gen B with new Gen C. The...
Replies
3
Views
197
JeffB
J
Back
Top Bottom