Using HW_Submodule Data Types

Hello, 

I'm having some difficulties understanding how to use the HW_Submodule Data Type. My setup is as follows: S7-1200 with a CM 1243-5 acting as a DP Master communicating with 8 Profibus DP slaves. I have my network all set up and it looks like the devices are all communicating properly and working. They have green check marks when I put the PLC into online mode, and using ProfiTrace I can see that the subdevices are all in data exchange and communicating, so I am pretty confident that I have the communication side of the network configured properly. 

My question is, I want to pull the process data from my subdevices (they're all temperature transmitters) and just monitor them or do calculations with them in the TIA Portal STEP7 V14. If I look at a subdevice in Device View, I can see that the module has 4 values (AI_1, AI_2, AI_3, AI_4), and they have an I address assigned to them. I want to be able to pull those values into the PLC program. If I look under PLC Tags at the Default Tag Table, i can see all the tags for the values of my subdevices and they're of data type HW_Submodule. My question is, are there any tutorials or examples for how to pull in 3rd party values into the PLC program? If not, can anyone help me? I'm confused as to how to use this HW_Submodule data type in the function blocks, is there a way to convert it to a string or character array or something? This is my first time using anything Siemen's for a PLC project, so please excuse me if I'm missing something glaringly obvious. 

Thank you very much!

 Hi ,

Can you add again the pdf?

0_Einstein

In looking at your project tree, in the left pane where the plc and program blocks/tags and so on are located, select the "Devices & networks" just *above* the plc in the tree.

In the middle or working panel/apne, you see devices connected to your PLC via the profibus module.

In newer versions of portal, the right side of that pane shows the data interface options and addresses - if you have added the telegrams (or if they get added automatically with those devices).

In the right half (you may need to slide or expand the right half of the working area to see it) is the addressing assigned as you added the devices to your project.

The default drag/drop adding of the E&H device using the GSD found here: https://portal.endress.com/webapp/ProductContainerGUI/plain/ is 4 AIs and 1 output to the transmitter.

The PDF included with the zip file at that link -- around page 32 -- describes the cyclic data setup.

If it were me, I would delete all the E&H transmitter inputs and outputs but leave the profibus slave devices.  Then in the hardware catalog on the right, add just one AI block, then temperature value!

I do not need to write back to the transmitter, and I do not need 4 ways to see the temperature.  If you need them, that's fine.  Just slows down the profibus network a bit.

The I address column shows the input address range used.

That pdf I mentioned said temperature comes in a 4 bytes in IEEE floating point format, and 1 byte of status info.

I leave it to you to read the PDF, experiment with dragging in just the AI's you need and will use, and then use ID### for your temperature value tags set as floating point.

I am thinking they will be the wrong "endian" and if so, google how to swap the bytes around from IEEE to Siemens S7-1200/1500 floating point representation.

nboch12

Hello, 

I'm having some difficulties understanding how to use the HW_Submodule Data Type. My setup is as follows: S7-1200 with a CM 1243-5 acting as a DP Master communicating with 8 Profibus DP slaves. I have my network all set up and it looks like the devices are all communicating properly and working. They have green check marks when I put the PLC into online mode, and using ProfiTrace I can see that the subdevices are all in data exchange and communicating, so I am pretty confident that I have the communication side of the network configured properly. 

My question is, I want to pull the process data from my subdevices (they're all temperature transmitters) and just monitor them or do calculations with them in the TIA Portal STEP7 V14. If I look at a subdevice in Device View, I can see that the module has 4 values (AI_1, AI_2, AI_3, AI_4), and they have an I address assigned to them. I want to be able to pull those values into the PLC program. If I look under PLC Tags at the Default Tag Table, i can see all the tags for the values of my subdevices and they're of data type HW_Submodule. My question is, are there any tutorials or examples for how to pull in 3rd party values into the PLC program? If not, can anyone help me? I'm confused as to how to use this HW_Submodule data type in the function blocks, is there a way to convert it to a string or character array or something? This is my first time using anything Siemen's for a PLC project, so please excuse me if I'm missing something glaringly obvious. 

Thank you very much!