[Emc-users] Decompiling PLC file

[Dale Ertley]

Hello All,

Does anyone have the knowledge and/or software to decompile the PAL (Programmable Application Logic) files from an Allen Bradley 8400MP CNC control?

I have the 2 files from the Hi and Low EPROMs. They were saved as Hex, ASCI, and BIN files.

The data from these files would be a good starting place for developing a Classic Ladder file now that I am upgrading my machine to EMC2. I have ordered a Motenc board.

Thank you
Dale Ertley



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[Kirk Wallace]

Hello All, Does anyone have the knowledge and/or software to
decompile
the PAL (Programmable Application Logic) files from an Allen Bradley
8400MP CNC control? I have the 2 files from the Hi and Low EPROMs.
They were saved as Hex, ASCI, and BIN files. The data from these
files would be a good starting place for developing a Classic Ladder
file now that I am upgrading my machine to EMC2. I have ordered a
Motenc board. Thank you Dale Ertley

What kind of machine are you converting? If the mechanics are not that
complicated, I wonder if you would be better off starting from scratch.
Sometimes a machine will have a number of separate simple systems that
only look complicated if viewed as a whole. To me, it sounds like
decompiling ROMs is complicated from the start.

[John Thornton]

Dale, In most cases it is better just to write new ladder than to try and port from one
system to another. I've been programming PLC's for longer than I can remember. I
can assist if needed.

Basicly you need three things:
1 List of inputs
2 List of outputs
3 List of what you want to happen when an input gets triggered.
Start with a pseudo list of what happens kinda like this:
When start is pressed (input 1)
if is safety circuit is closed(input 2)
if stop is not pressed(input 3)
start motor (output 1)

Big John T

Post by Dale Ertley
Hello All,
Does anyone have the knowledge and/or software to decompile the PAL
(Programmable Application Logic) files from an Allen Bradley 8400MP
CNC control?
I have the 2 files from the Hi and Low EPROMs. They were saved as
Hex, ASCI, and BIN files.
The data from these files would be a good starting place for
developing a Classic Ladder file now that I am upgrading my machine
to EMC2. I have ordered a Motenc board.
Thank you
Dale Ertley

[Dale Ertley]

John,
I will make the list in the next 2 or 3 weeks. By then I will finish reading HAL/Classic Ladder and then start the PLC program. If I have problems can I get some help from you?
Thank you for the assistance
Dale

John Thornton <***@semo.net> wrote:
Dale, In most cases it is better just to write new ladder than to try and port from one
system to another. I've been programming PLC's for longer than I can remember. I
can assist if needed.

Basicly you need three things:
1 List of inputs
2 List of outputs
3 List of what you want to happen when an input gets triggered.
Start with a pseudo list of what happens kinda like this:
When start is pressed (input 1)
if is safety circuit is closed(input 2)
if stop is not pressed(input 3)
start motor (output 1)

Big John T

Post by Dale Ertley
Hello All,
Does anyone have the knowledge and/or software to decompile the PAL
(Programmable Application Logic) files from an Allen Bradley 8400MP
CNC control?
I have the 2 files from the Hi and Low EPROMs. They were saved as
Hex, ASCI, and BIN files.
The data from these files would be a good starting place for
developing a Classic Ladder file now that I am upgrading my machine
to EMC2. I have ordered a Motenc board.
Thank you
Dale Ertley

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[John Thornton]

No problem Dale.

BTW, what is being controlled by the PLC now?

John

Post by Dale Ertley
John,
I will make the list in the next 2 or 3 weeks. By then I will finish
reading HAL/Classic Ladder and then start the PLC program. If I have
problems can I get some help from you? Thank you for the assistance
Dale