Hi Julian, so I spun up my TIA and did some String stuff ...
Defined 2 Sting variables: Name: Data type: Offset: Start value: Hurz1 String 314.0 'Der Wold, das Lamm" Hurz2 String 570.0 'Auf der grünen Wiese" After compiling the memory block (DB1), the offsets were automatically set. Then I added a CONCAT function to my PLC program and referenced those two fields as input. Here's what TIA made out of it: Hurz1: P#DB1.DBX314.0 Hurz2: P#DB1.DBX570.0 Notice the "P#" instead of the "%"? And it seems that the address looks like a BIT address, as it has the bit offset part set. But just comparing this to all the others, it seems like all types can have a bit-offset part set, this is just always ".0" for any non-bit type. Chris Am 02.09.18, 13:03 schrieb "Julian Feinauer" <[email protected]>: Hey everybody, I have another question about the semantics we should provide for reading / writing Strings in the S7 Driver. I have not found an example on how this is handled currently but to me it looks a bit like a mix of reading the data as “array”, i.e., using the size parameter on the request (= fixed size string) but handling it as null terminated String. As I have currently no TIA available, can anyone give me the syntax how Strings are addressed in TIA. I think they were fixed size always and I would prefer to do it that way. Could anyone who implemented this (or has expertise in this) help me out a bit? Thanks Julian
