Yesterday I asked about addressing TAGs when reading from TIA Portal, and with the help of others I was able to read and write them without any issues.
Now I’m trying to read variables from a DB in Ignition, but I’m getting the following error:
My settings on TIA portal side are (Based on what I found from internet and Inductive Help):
DB:
DB Settings:
Assigning the OUTPUT to DB’s variable:
Ignition side settings:
Am I missing or have done anything wrong?
Thanks in advance
Your OPC Item path could be QX0.0
Note the comma between the DB and the offset, and the different way of determining the data type.
(Edit: re-read the question, edited suggested item path to target output 0)
Also note that the two checkboxes you highlight in the hardware config do not apply to the S7 protocol.
Make sure Full Access (no protection) is used and that “Permit access with PUT/GET” is checked on the PLC side.
For your path it should be “[SIEMENS-1500]DB1,X0.0”. If you wanted just the output then it would be “[SIEMENS-1500]QX0.0”.
I am responding to this with the assumption you are using 8.1.
