IM151-7 CPU INTERFACE with Modbus RTU

Hello,

I am looking for some information about the IM151-7 CPU INTERFACE (6ES7151-7AA20-0AB0)

Here are my questions:

How many Modbus RTU slave devices can the IM151-7 communicate with?
What are the limits?

What is the maximum network distance the IM151-7 can handle using Modbus RTU?

What Simatic HMI devices can the IM151-7 communicate with?

What are the I/O options (limits) for the IM151-7?d

How Can the IM151-7 communicate with WinCC flexible?

Thank you for your help.

Look up the stats on the IM 151-7 CPU in thelast manual, as far as I/O count and selectable modules. There is also a list of ET 200S manuals shown, so you can locate more information as you need it.
The IM 151-7 generally acts as a slave on Profibus-DP (to a S7-300 Profibus master, for example) or can act as a stand-alone CPU (in MPI-mode), if required.
Communication with WinCC if used in DP-slave mode would be through the DP-master; if used in MPI-mode, then you can use the MPI channel in WinCC Flexible to connect directly to the IM 151-7 CPU.
As far as Modbus communications are concerned, once you have installed, configured and programmed the 1SI Modbus/USS interface module, then your limitation is mostly Modbus-based: bus speed, number of slaves, rotation time...
Come back with specific questions when you have looked at the basic info.
Hope this helps,
Daniel Chartier