S7 communication with Technology Object

[antonin_sanitas]

Hi every one,

I am trying to communicate with S7 protocol a S7-1500 and Ignition. Actually, communication with standard DB works. The issue comes with the “technology objects” as the do not have an address like other variables.

What would be the correct syntaxis to read these variables ?

Here are the TO I tried to connect.

Thanks

[David_Stone]

I would think its in a similar place to this thread:

[Question] 8.3 siemens S7+ driver adress format

We plan to support this with the new driver. We had to update our TIA Portal in order to test this. The current plan is for the item paths to look something like this: ns=1;s=[1500ss]PLC.Blocks."unit1.Unit_Block".Tag1 ns=1;s=[1500ss]PLC.Blocks."unit2.Unit_Block".Tag1 This is subject to change until we actually release, but this looks promising to me.

[antonin_sanitas]

Thanks you for your anwser. However, if understood well, the related post give OPC UA connections path and not S7 path as in S7 there is not a namespace “nsu=” but only the path. I mean, that I would like to connect to PLC by S7 Driver and not OPC UA driver.

[pturmel]

The new S7 driver may be able to do this, but is only available in v8.3 (currently a release candidate). If you test v8.3, this discussion belongs in that category.

If you are trying to do this in v8.1, it is not possible with the native S7 protocol.

[David_Stone]

All tags from devices in Ignition exist in the Ignition OPC-UA server. The device drivers are effectively interfaces to the internal OPCUA server, therefore they all have namespace identifiers.

[Cody_Morgan]

I've not tested this with the new driver in v8.3. I'll try to test it in the next few days.