Hi,

How do I get absolute address of tags defined inside readonly data block?

Recently I had to integrate a Siemens PLC with 3rd party HMI. There is a protected data block in the PLC. Instead of directly addressing tags inside it I had to define a intermediary data block, move data between these two blocks and use absolute address of the intermediary data block in the HMI. This to my mind is unoptimized way of doing things.

BR//Ashadul

HI ashadul,Once check this page,

https://support.industry.siemens.com/tf/ww/en/posts/need-absolute-address-but-db-is-symbolic/102130/?page=0&pageSize=10

Hi,

Its a know-how protected read only data block. Here its not possible to toggle Optimized block access.

BR//Ahadul

yes I understand that If it's a know how protection block the protection is inherited by the instance data block when calling a single instance. So you can modify it only if you know the password .If you lost the password no further modification can be done.However you can cancel the know how protection only in the offline mode.

Ignore if this is not what you are looking for.