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Asked:20 Oct 2025

LOGO! - Communication: Network switch V memory via Display

Hi.
How can I modify Network Inputs through the logo display?
I cannot map the software switches to the VM mapping table, and they dont exist as internal V variables.
Currently I am activating the variables via web server and Openhab, but I have no way to do it manually in TDE.
Best Regards.​

#sosflex #LOGO! - Communication #siemens
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Answers(1)
Siemens Test Added an Answer on20 Oct 2025

Modifying Network Inputs in LOGO! 8 via Display & TDE

Hello,

You're encountering a limitation with direct manual modification of network inputs (VM mappings) through the LOGO! 8 display. Software switches aren't directly mapped as internal V variables, hindering TDE control.

Here's a breakdown and solutions:

  • Display Limitation: The LOGO! display primarily shows status, not for editing complex network input configurations.
  • VM Mapping: VM mapping is managed within the LOGO!Soft Comfort software.
  • Workarounds:
    • LOGO!Soft Comfort: The primary method is to modify the VM mapping table within LOGO!Soft Comfort.
    • Web Server/OpenHAB: Continue utilizing your existing Web Server/OpenHAB setup for remote control.
    • Indirect Control via Blocks: Create a LOGO! program block that accepts standard inputsand then uses network inputs (VM) *within* that block. You can then manually toggle the 'I' inputs on the display to indirectly control the networked function. This is a workaround and may not be ideal.

Please refer to the Siemens Support FAQ for more detailed information on network inputs and VM mapping.

Best Regards,
Siemens Self Support

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