S5 115U 943B "LIR" instruction ?

uptown47 · Nov 3, 2010

Hi all,
I'm stuck trying to transfer some S5 software to S7.

The S5 PLC is a 115U 943B and the S7 PLC is a 314C-2DP.

I've copied the code below and my interpretation of it but I have a couple of queries:

1) How can I find out what KH E4CA (and the other hex addresses) refer to? I've been searching this forum and google with this problem and, from what I've read, it seems that L KH E4CA is refering to a 'System address' that is specific to the S5 PLC type ?? Is this correct? Or is it just a value, like loading L 58570 in S7 ?

2) Reading the code it seems that the initial loading of the ACCU 1 is redundant as each section eventually just jumps to M003 which overwrites ACCu 1 with KH E4CA anyway? Or am I missing something here?

Code:

C DB 101        (OPEN DB 101)
AN F 237.2      (WITHOUT F237.2 JUMP TO THE END OF THE BLOCK)
JC =M001
AN F 91.1       (WITHOUT F91.1 JUMP TO M002)
L KH E416       (LOAD ACCU 1 WITH HEX E416)
LIR 0           (LOAD ACCU 1 WITH THE VALUE AT ADDRESS E416)
ADD KF+51       (ADD 51 TO THE VALUE IN ACCU 1 AND STORE IN ACCU 1)
 
JU =M003         (JUMP TO M003)
M002: AN F 91.2  (WITHOUT F 91.2 JUMP TO M004)
JC =M004
L KH E418         (LOAD ACCU 1 WITH HEX E418)
LIR 0             (LOAD ACCU 1 WITH THE VALUE AT ADDRESS E418)
ADD KF+51         (ADD 51 TO THE VALUE IN ACCU 1 AND STORE IN ACCU 1)
 
JU =M003 
 
 
... SAME PATTERN REPEATED BUT WITH DIFFERENT HEX ADDRESSES (E41A / E41C / E41E / E420 / E422 / E424 / E426 / E428 / E42A / E42C)
 
 
M003: L KH E4CA   (LOAD ACCU 1 WITH HEX E4CA)
LIR 0             (LOAD ACCU 1 WITH THE VALUE AT ADDRESS E4CA)
ADD KF+51         (ADD 51 TO THE VALUE IN ACCU 1)
TNB 50            (DOES THIS SOMEHOW TRANSFER 50 BYTES TO SOMEWHERE???)
 
M001: BE

Any help on how I can transfer this to S7 would be greatly appreciated.

By the way DB101 (the DB that is opened initially) has 255 words in it and they all just hold arbitary values 250, 80, 25, 10 etc etc

A big thanks for any light you can shed on this.

Cheers

;-)

PeterW · Nov 3, 2010

LIR is a pointer and yes the Exxx number are pointing to specific data areas (absolute memory areas), probably Datablocks.

You need the memory map of the specific PLC, the S5 CPU manuals used to have these.

EDIT:

Old thread with same Q and mem map listed.

http://www.plctalk.net/qanda/showthread.php?t=56828

PeterW · Nov 3, 2010

some more threads with explanations

http://www.plctalk.net/qanda/showthread.php?t=53359

http://www.plctalk.net/qanda/showthread.php?t=39561

http://www.plctalk.net/qanda/showthread.php?t=53359

uptown47 · Nov 3, 2010

Hi Peter

Thanks for the links. I've read some of them before I posted but I was still stuck.

A BIG thanks for the link to the memory map. I'm now a bit further along. Here's the latest interpretation with my queries regarding this:

Code:

C DB 101        (OPEN DB 101)
AN F 237.2      (WITHOUT F237.2 JUMP TO THE END OF THE BLOCK)
JC =M001
AN F 91.1       (WITHOUT F91.1 JUMP TO M002)
L KH E416       (LOAD ACCU 1 WITH MEMORY MAP ADDRESS OF DB 11)
LIR 0           (LOAD ACCU 1 WITH POINTER POINTING AT DB11.DW0 ) - [COLOR=#ff0000]IS THIS CORRECT?[/COLOR]

ADD KF+51       (ADD 51 TO THE VALUE IN ACCU 1 AND STORE IN ACCU 1) - [COLOR=red]ACCU 1 NOW HOLDS POINTER DB11.DW51 ? IS THIS CORRECT? IS IT AN OFFSET OF 51 BYTES OR WORDS ?[/COLOR]
 
JU =M003         (JUMP TO M003)
M002: AN F 91.2  (WITHOUT F 91.2 JUMP TO M004)
JC =M004
L KH E418         (LOAD ACCU 1 WITH MEMORY MAP ADDRESS OF DB 12)

LIR 0             (LOAD ACCU 1 WITH POINTER POINTING AT DB12.DW0)

ADD KF+51         (ACCU 1 POINTER NOW POINTS TO DB12.DW51 ?)
 
JU =M003 
 
 
... SAME PATTERN REPEATED BUT WITH DIFFERENT HEX ADDRESSES (DB 13 through to DB 22 inclusive)
 
 
M003: L KH E4CA   (LOAD ACCU 1 WITH MEMORY MAP OF DB 101) - [COLOR=#ff0000]HAVE WE NOT JUST OVERWRITTEN OUR POINTER WE CREATED EARLIER??[/COLOR]
[COLOR=#ff0000][/COLOR]
LIR 0             (LOAD ACCU 1 WITH POINTER POINTING AT DB101.DW0)

ADD KF+51         (ACCU 1 NOW EQUAL TO DB101.DW51)

TNB 50            [COLOR=red](LOGICALLY I WOULD SAY THAT THIS COPIES 50 BYTES OF DB11.DW51 - DB11.DW101 ACROSS TO DB101.DW51 - DB101.DW101 BUT HAS ACCU 1 NOT BEEN OVERWRITTEN WITH THE L KH E4CA INSTRUCTION?? )[/COLOR] 
M001: BE

I've got a great block written by "L D[AR2,P#0.0]" from one of the links earlier in the thread to transfer DB's over but I just need to understand 'what' I need to be transfering.

Thanks again for your continued help.

;-)

uptown47 · Nov 3, 2010

Right... after doing some digging and searching and muddling... I think I've sussed what's happening.

I'll post it here in the hope that it might help someone who finds this thread in the future but I would be grateful if someone could confirm this is correct:

Code:

C DB 101        (OPEN DB 101)
AN F 237.2      (WITHOUT F237.2 JUMP TO THE END OF THE BLOCK)
JC =M001
AN F 91.1       (WITHOUT F91.1 JUMP TO M002)
L KH E416       (POINTER TO  DB11.byte 0)
LIR 0           (LOAD ACCU 1 WITH POINTER POINTING AT DB11.byte 0 )

ADD KF+51       (ADD 51 BYTES TO POINTER - DB11.BYTE 51) 
JU =M003         (JUMP TO M003)

 
M003: L KH E4CA   (DB 101.BYTE 0 POINTER )
 
LIR 0             (LOAD ACCU 1 WITH DB101.BYTE 0)

ADD KF+51         (ACCU 1 NOW EQUAL TO DB101.BYTE 51)

TNB 50            [COLOR=red](SRC IS DB11.BYTE 51 - DESTINATION IS DB101.BYTE 51 AND IT COPIES FROM BYTE 51 TO 0 ACROSS)[/COLOR] 
M001: BE

As I said. Can someone confirm that is correct.

It seems to be right from what I've read...

Many thanks for all your help (PeterW) in pointing me in the right direction. Much appreciated.

;-)

z7iliga · Nov 9, 2015

hi every body please if some one can help me
i need to megrate a program from s5 to Rslogix 5000 how can i translate the (LIR) instruction

uptown47 · Nov 9, 2015

Hi there,

This is a really old thread. You will get more success if you create a new thread about this.

z7iliga · Nov 9, 2015

Thanks

S5 115U 943B "LIR" instruction ?

uptown47

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uptown47

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z7iliga

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