BeVee

Hi Sasongko,

FW200 = FY200 + FY201
or in German mnenotics
MW200 = MB200 + MB201

Kind regards,
BV

 hello sir 

could you help me please?

I have some S5 code and I want to revamp this code to S7 but I don't know the meaning of ( L KG     / G) , because we usually use this instruction to dividing two numbers, but no numbers have been loaded in (L KG).

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Split from Need explanation of this STL program.

Hello goudarz;

I believe that this snippet of code is manipulating REAL data (floating-point values), not splitting registers.

See if the entries in this thread from BeVee and fritz, both very knowledgeable on S5 systems, can provide guidance:

https://support.industry.siemens.com/forum/ca/en/posts/need-explanation-of-this-stl-program/76681/?page=0&pageSize=10

Hope this helps, 

Daniel Chartier

fritz

Hello Sasongko

it's actually quite simple, but you need to appreciate the structure of the S5 Analogue input value (see also attached pic and grab also a copy of the S5-90U/S5-95U Programmable Controller System Manual which contains your AI card).
The mostsignificant bit (bit 15) is the sign bit.
The least three significant bits (bit 0, 1 and 2) contain overflow and error bits.

Your Block is a simple analogue input "scaling" FB which actually doesn't do all that much useful stuff, but here's a commented version of it anyhow:

: DO DB 161 // open DB161

:

: L PW 154 // load raw AI value

: T FW 200// and store in FW200

:

: A F 200.7 // If raw AI value is negative(Sign bit = 1)

: = F 255.0 // memorise this

:

: AN F200.7 // If raw AI is positive(Sign bit = 0)

: JC M001 // --> Jump

: L FW 200 // Else: (raw AI value is negative)

: CSW // do two's complement (= make negative value positive)

: T FW 200 // and store it back in FW200

M001 : L FW 200

: SRW 3 // get rid of overflow, error and unused bits 0-2

: FDG // convert to floating point value

: L KG +1000000+01 // load 1.0

: XG // multiply raw AI with 1.0

: L KG +5000000+00 // load 0.5

: +G // add 0.5 to above result

: GFD // convert to Double Integer

: T DW 70 // storevalue in DW70 (of DB161)

I hope this helps

 hello sir 

could you help me please?

I have some S5 code and I want to revamp this code to S7 but I don't know the meaning of ( L KG     / G) , because we usually use this instruction to dividing two numbers, but no numbers have been loaded in (L KG).

L DW 31 - load the value from Data Word 31 as a 16 bit fix point number, e.g. Integer
FDG - convert the fix point number to a floating point number
L KG - load a floating point number, here should be a value
/G - divide the content of DW31 trough the loaded floating point number
T DD 32 - transfer the result to Data Double Word 32
GFD - convert the floating point number to a fix point number
T - transfer the result to ... e.g. DW xx

The result is in DD32 as a floating point number and after converting at the addressed target

Hope this is helpful.

regards
CaOd

CaOd

Hello,

L DW 31 - load the value from Data Word 31 as a 16 bit fix point number, e.g. Integer
FDG - convert the fix point number to a floating point number
L KG - load a floating point number, here should be a value
/G - divide the content of DW31 trough the loaded floating point number
T DD 32 - transfer the result to Data Double Word 32
GFD - convert the floating point number to a fix point number
T - transfer the result to ... e.g. DW xx

The result is in DD32 as a floating point number and after converting at the addressed target

Hope this is helpful.

regards
CaOd

 Hello sir 

How kind you are to help me.

I find out what's the problem .

I used a version of S5/S7 software to opening of the program .

in this version , numbers with real value are not shown so I couldn't see (L KG 1.200  /G).

I think this is a software problem.

goudarzi91

 

BeVee

Hi Sasongko,

FW200 = FY200 + FY201
or in German mnenotics
MW200 = MB200 + MB201

Kind regards,
BV

 hello sir 

could you help me please?

I have some S5 code and I want to revamp this code to S7 but I don't know the meaning of ( L KG     / G) , because we usually use this instruction to dividing two numbers, but no numbers have been loaded in (L KG).

L DW 31

FDG

L KG

/G

T DD 32

GFD

T

Please don't post twice for the same problem.

You ask the same in your own topic:

programming - 292155 - Industry Support Siemens