convert from S5 to S7

houssem11

Please, your support is needed to convert the following S5 function code to equivalent in S7 after migration i have this programme (please see the attachment) missing to convert the : OB181,LIR1;TIR3;BS34..... I i need your help please for this fonction i read the manuel for s5 and s5, s7 convert but but i can not find a solution . thanks for you replay -------

Hello houssem11

In S5 depending on your CPU these where Organization Blocks with special functions, for example creating and testing a Data Block.

To find out, please look at the S5 Programming Guide for your S5 CPU

I am certain that in your case you can omit this OB, and it will be not required in your S7 Program.

Regards / m.f.g

houssem11

Please, your support is needed to convert the following S5 function code to equivalent in S7 after migration i have this programme (please see the attachment) missing to convert the : OB181,LIR1;TIR3;BS34..... I i need your help please for this fonction i read the manuel for s5 and s5, s7 convert but but i can not find a solution . thanks for you replay -------

 Hi,

Here is the meaning of each instructions,

Call OB 181 - Test data blocks (DB/DX)

LIR - Load register with the contents of a memory word  addressed by ACCU 1

TIR - Transfer register contents into the memory word  addressed by ACCU 1      

BS - Is the ISTACK ID, Meaning = Content of base address register prior to the transition to stop mode.

Here is the link for the list of operations of different model numbers of S5 CPU's. Refer the documents for more detailed informations.

S5-135U/155U CPU 928/CPU 928B/CPU 948 List of Operations

S5-135U/155U List of Operations

Hello,

first you must check if the FB175 is used. If used the next step is to analyze the function. If you understand it then you can realize it in Step7 with inspiration from the S5-program. If no understanding -> big Problem without comments in the program.

Regards