s7200 subroutines

maniec · Sep 12, 2006

May seem silly, but ive been trying to use subroutines in s7 microwin as I would in Step7, ie to create on subroutine (for example for analogue HH, H, L LL Alarms and then callinf the subroutine numerous times wit different in and out variables. Doesnt seem to work?????/ Anybody have any ideas???

DDV · Sep 13, 2006

Do you want to use it like you would a FB in Step7?

jvdcande · Sep 13, 2006

maniec said:
May seem silly, but ive been trying to use subroutines in s7 microwin as I would in Step7, ie to create on subroutine (for example for analogue HH, H, L LL Alarms and then callinf the subroutine numerous times wit different in and out variables. Doesnt seem to work?????/ Anybody have any ideas???

It does work, but only with the second generation S7-200s (S7-22X). You didn't mention what CPU you tried it on, so this could be the problem.

DDV said:
Do you want to use it like you would a FB in Step7?

Now that is completely impossible. Subroutines in S7-22X are equivalent to FCs in S7-300/400.

Kind regards,

maniec · Sep 13, 2006

jvdcande said:
It does work, but only with the second generation S7-200s (S7-22X). You didn't mention what CPU you tried it on, so this could be the problem.
Now that is completely impossible. Subroutines in S7-22X are equivalent to FCs in S7-300/400.

Kind regards,

Yes DDV, like an FB. I'm using a CPU224 brand new out the box (think v2.01). If subroutines are like FC's in step 7 then obviously I cant???

DDV · Sep 13, 2006

No not like a FB. You can create recipes that you can add “variable” tags to. Play with the Recipe Wizard and see how it works.

Ek weet nie of dit jou doel gaan dien nie, ek sal bietjie rond krap en jou laat weet wat ek kry.

maniec · Sep 13, 2006

DDV said:
No not like a FB. You can create recipes that you can add “variable” tags to. Play with the Recipe Wizard and see how it works.

Ek weet nie of dit jou doel gaan dien nie, ek sal bietjie rond krap en jou laat weet wat ek kry.

Want to use it as a multiple instance, but seems its not possible to call the same SR multiple times, because there is nowhere to assign a specific working memory area for it, ie. in a call the SR with a db area attatched to it, like in step7.

DDV · Sep 13, 2006

You looking to do something like this?

DDV · Sep 13, 2006

You looking to do something like this?

maniec · Sep 13, 2006

DDV said:
You looking to do something like this?

EXACTLY!!! But it seems that the local variable data is not initialised with each call, so it transfers over to the next call

maniec · Sep 13, 2006

DDV said:
You looking to do something like this?

EXACTLY!!! But it seems that the local variable data is not initialised with each call, so it transfers over to the next call

maniec · Sep 13, 2006

DDV said:
You looking to do something like this?

EXACTLY!!! But it seems that the local variable data is not initialised with each call, so it transfers over to the next call

DDV · Sep 13, 2006

The data is stored in local memory; I’m not sure how this affects what you want to do. The only problem will be in the nesting depth, I think the block can only be called 8 times…..

As I understand FB’s in Step7 I believe that this is the closest you will get to it using a 200, it’s pretty close I think?

maniec · Sep 13, 2006

DDV said:
The data is stored in local memory; I’m not sure how this affects what you want to do. The only problem will be in the nesting depth, I think the block can only be called 8 times…..

As I understand FB’s in Step7 I believe that this is the closest you will get to it using a 200, it’s pretty close I think?

Might be wrong here, but the only way I get it to work at the moment is by duplicating the SR (making a lot of the same SR's)

DDV · Sep 13, 2006

Well that sort of defeats the object doesn’t it? In my example you can see that I call the same subroutine twice, I loaded it on a 224 XP and it works fine….

Zip your code and post it, then I can have a look.

maniec · Sep 13, 2006

DDV said:
Well that sort of defeats the object doesn’t it? In my example you can see that I call the same subroutine twice, I loaded it on a 224 XP and it works fine….

Zip your code and post it, then I can have a look.

Have a look at SBR11 where sbr30 and 31 is used

s7200 subroutines

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