mizzatikram

Joined Jan 20, 2022
4
Hye Experts and fellow users,

First of all, I'm doing my own arduino project by self-learning on youtube. Right now, I'm stuck at converting my ladder diagram into a circuit in Proteus. The individual simulation of the ladder circuit worked on FLuidSim however due to my limited knowledge in electrical/electronics, I'm unable to translate the ladder diagram in Proteus.

I hope you can guide me in this matter. Thank you!

*please excuse my writing as English is not my 1st language

Attachments

• 31.2 KB Views: 19

Papabravo

Joined Feb 24, 2006
20,621
Your first problem will be understanding the symbols:
The "open" circles labeled M1, M2, and R are relay coils which are always in one of two possible states: energized or not
When a coil is "energized", current is flowing between the power rails 0V and +24V, and all of the normally open contacts are closed and all of the normally closed contacts are open.
When a coil is "not energized", there is no current flowing through the coil between the power rails 0V and +24V, and all of the normally open contacts are open and all of the normally closed contacts are closed.
Switches are just switches.

mizzatikram

Joined Jan 20, 2022
4
Your first problem will be understanding the symbols:
The "open" circles labeled M1, M2, and R are relay coils which are always in one of two possible states: energized or not
When a coil is "energized", current is flowing between the power rails 0V and +24V, and all of the normally open contacts are closed and all of the normally closed contacts are open.
When a coil is "not energized", there is no current flowing through the coil between the power rails 0V and +24V, and all of the normally open contacts are open and all of the normally closed contacts are closed.
Switches are just switches.
Yes I understand the symbols. But it's so confusing to connect them,

Papabravo

Joined Feb 24, 2006
20,621
It is mostly a matter of pattern recognition:
where a series connection of contacts is a Boolean AND function
and a parallel connection of contacts is a Boolean OR function

Example: For Coil R

R = .NOT.(M2) .AND. ( R .OR. M1 )

See the pattern?

Joined Jul 18, 2013
28,066
Just a minor point, traditionally the power side is on the LH rail and the 0v or N is on the right hand side in ladder diagrams.

Last edited:

eetech00

Joined Jun 8, 2013
3,663
Hye Experts and fellow users,

First of all, I'm doing my own arduino project by self-learning on youtube. Right now, I'm stuck at converting my ladder diagram into a circuit in Proteus. The individual simulation of the ladder circuit worked on FLuidSim however due to my limited knowledge in electrical/electronics, I'm unable to translate the ladder diagram in Proteus.

I hope you can guide me in this matter. Thank you!

*please excuse my writing as English is not my 1st language
I've converted the ladder diagram to relay symbols. You should be able to find equivalents in proteus.

mizzatikram

Joined Jan 20, 2022
4
It is mostly a matter of pattern recognition:
where a series connection of contacts is a Boolean AND function
and a parallel connection of contacts is a Boolean OR function

Example: For Coil R

R = .NOT.(M2) .AND. ( R .OR. M1 )

See the pattern?
Ahhh I see. I will try this method Thanks btw!

mizzatikram

Joined Jan 20, 2022
4
I've converted the ladder diagram to relay symbols. You should be able to find equivalents in proteus.

View attachment 258280
I appreciate the effort! However, the connection in Proteus is like this. I understand a simple relay connection as per image however my circuit is confusing to connect

Attachments

• 467 KB Views: 5

eetech00

Joined Jun 8, 2013
3,663
I appreciate the effort! However, the connection in Proteus is like this. I understand a simple relay connection as per image however my circuit is confusing to connect
You can parallel relay coils to get more contacts....if thats what you mean....

vu2nan

Joined Sep 11, 2014
340
Hi mizzatikram,

You would require relays with 4PDT contacts.

The ladder diagram is the circuit diagram.

'SW' is an SPST toggle switch and 'M1', 'M2' and 'R' are the relay coils and contacts.

The relay coil and contact terminal numbers are marked.

Nandu.

Last edited: