MNEMONIC CODE conversion

[unsaint33]

Can you please verify my mnemonic code conversion? Thank you

LD KR 2
AND 4
LD KR 0
OR 2
OUT 15

 

[parky]

I would have thought it would be

LD KR2
AND 4
OR KR0
OR 2
OUT 15
But it could depend on the PLC.

 

[unsaint33]

It's OMRON SYSMAC S6

 

[parky]

Blimey, that's digging up a relic, cannot remember that far back but I believe the code I posted should be correct, If I remember correctly LD is only used on it's own if it is the start of the ladder, If there are two contacts in the OR function then it becomes LD x AND y OR LD
But just one contact ORed around many contacts is still just an OR.
Actually I just tried it on a Mitsubishi & the mnemonic code is as I posted.

 

[unsaint33]

Thank you so much.

 

[gtsuport]

With the code in the first post. you would need an OR LD before the OUT 15.


gtsuport

 

[parky]

Do not have an S6 but in Mitsubishi an OR LD is illegal, I cannot remember being able to do it in Omron either & there is no need.
Looking at the S6 manual it seems the way I posted is correct.

 

[simisteven]

Hi Parky, I am not far from you near Mansfield. I have 6 pages on mnemonic code which I need to translate in ladder version and I have got bogged down. Can you assist please?

 

[parky]

I possibly can help, I have sent you a PM.

 

[drbitboy]

I have automated the process somewhat. See this URL: https://www.plctalk.net/qanda/showthread.php?p=896338#post896338


That script will run in Windows System for Linux.


The script agrees with @parky's analysis from Post #2 of this thread.