Siemens S7 data block - String
Siemens S7 data block - String
(OP)
Hi,
I am trying to access stings in Data Blocks with "OPC Scout". However I can access only a few of the DBs. For example I can access DB 20 and DB 28 but not 19. What is the reason?
More detail: OPC Scout shows the aviable address from 0 to 31 for accessable DBs, and 0 65656 for not accessable DB. I think it is not logical too. Why may DBs differ from each other? if not why OPC shows different values for different DBs and I can not access some of them?
Any help??
Thank you =)
I am trying to access stings in Data Blocks with "OPC Scout". However I can access only a few of the DBs. For example I can access DB 20 and DB 28 but not 19. What is the reason?
More detail: OPC Scout shows the aviable address from 0 to 31 for accessable DBs, and 0 65656 for not accessable DB. I think it is not logical too. Why may DBs differ from each other? if not why OPC shows different values for different DBs and I can not access some of them?
Any help??
Thank you =)





RE: Siemens S7 data block - String
You might want to look into that area to see what the different data blocks are being used for and check to see if there is some pattern to that.
Next time I head by our PLC lab, I will look into it and see if my thoughts hold any water.
Hope that helps.
Knox