How to set an S7 string

Hi!

I have an DB with strings of a type String[10]
How can I set the strings from my software.

I'm looking for something like:


After this set I can use the blockmove SFC20 instruction to copy the string to the DB.

When I type:


Can anyone give me some answers or tips?!

Thanks.

I found out that Siemens suggest to make a DB with all the text messages you need. Then you can copy the text you want from te DB. OK this works but if anyone knows how to do it in an other way please feel free to tell me.

Thanks!

well... i think, you can access directly elements like an array if string defined in datablock :

L "swp".swpstr[1]
T "swp".swpstr[1]

...but... can i ask you what is the string good for? - i never need an string in CPU (just in OP) ... and i have suspicion about dynamic changing of string length too ...

Declare your strings in a DB and then select the string from the DB as the source.

Using the L 'TEST' method will only work for up to 4 characters as this occupies the full 32 bits of the accumulator.

marius said:

well... i think, you can access directly elements like an array if string defined in datablock :

L "swp".swpstr[1]
T "swp".swpstr[1]

...but... can i ask you what is the string good for? - i never need an string in CPU (just in OP) ... and i have suspicion about dynamic changing of string length too ...

Click to expand...

My customer needs a recipe list. But he wanted some special editing and limits to the recipe which was hard to do in protool. Thats why I have a fixed length recipe list in the plc. String lengths are also fixed so no worry's there.