Tag value is not the same that I have in the PLC

Odd-Simon_Simonsen · April 23, 2024, 10:52am

My tag in Ignition shows over 1 billion. Anyone else come across this problem?

Odd-Simon_Simonsen · April 23, 2024, 10:55am

When I change the OPC Item Path to another adress (IW) I get the expected value up. But when I use the adress (MD) I get the one billion value up.

Transistor · April 23, 2024, 11:05am

What PLC brand and model?
What Ignition driver?

Odd-Simon_Simonsen · April 23, 2024, 11:08am

Siemens S7-1500

Ignition Vision version 8.1.35

Transistor · April 23, 2024, 11:12am

The Ignition driver should be "Siemens S7-1500". It will be configured in the gateway Config → OPC UA → Device Connections.

Odd-Simon_Simonsen · April 23, 2024, 11:16am

Yeah it does have the correct drive

zxcslo · April 23, 2024, 11:28am

Change the tag type from double to float.
Float is 32-bit (like REAL in S7), double is 64-bit...
Then use in OPC Item Path: [plc10101]MREAL2
https://www.docs.inductiveautomation.com/docs/8.1/ignition-modules/opc-ua/opc-ua-drivers/siemens#data-type-syntax

Odd-Simon_Simonsen · April 23, 2024, 11:32am

I have tried that, but it doesent seem to fix the problem..

pturmel · April 23, 2024, 11:58am

Your screenshot still shows MD2 as the OPC Item path. You need to change that as @zxcslo directed.

Odd-Simon_Simonsen · April 23, 2024, 12:02pm

Oh sorry, didnt realise!
Thanks zxcslo, and thanks pturmel aswell!

pturmel · April 23, 2024, 12:14pm

Pssst! You should mark @zxcslo's comment as the solution...