Siemens S7-1500 – model and CPU identification are highlighted.
## Supported protocols
Click on the protocol you want to use for connecting your S7-1500 to access the corresponding guide.
| Protocol | Recommended | Comment |
| ------------------------------------------------------------------------ | -------------------- | -------------------------------------------------------------------- |
| [S7+](/en/connect/ot-connectivity/supported-industrial-protocols/s7+.md) | :white\_check\_mark: | The native and more performant protocol. A password may be required. |
| [OPC-UA](/en/connect/ot-connectivity/supported-industrial-protocols.md) | :x: | May need to be activated separately at additional cost. |
## Required information
The following information is needed to create a data source for the S7-1500:
| Information | Comment |
| ------------ | --------------- |
| Manufacturer | Siemens |
| CPU model | See image above |
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://docs.enlyze.com/en/connect/ot-connectivity/supported-controller-brands/siemens/s7-1500.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.