Hi, I am having trouble with writing string into the PLC tag. I am using Siemens S7-1500 series PLC.
I am able to read from it, but when I set the value to new string, it blanks it out and value in the PLC is set to null.
I have the following tag configuration:
I also have full read write enabled and the user permissions allow for writing data:
Please can you advise?
The address you're using doesn't make any sense - you are specifying 0 for the string length.
Thanks. I removed the .0 from the end of tag and it solved the problem.
By the way is there a way of addressing in the SCADA without using the absolute address?
I would like to refer to that sting by using it's PLC name space if that makes sense
The S7-1500 has a built in OPC UA server that you can make an OPC connection to directly, instead of using the S7 driver for Ignition's server. This allows symbolic browsing, access to optimized DBs, etc...
Thanks for the advice. I've done that. Everything works perfectly.
