How to Save a SIMIT Unit IP Address Configuration in SIMIT V10.2

In SIMIT V10.2, the documented “Setting up a SIMIT Unit” procedure uses the SIMIT Unit management dialog to set its name, IP address and subnet mask, then saves that configuration in the unit. In the reported case, the operator instead assigned the address through TIA Portal's accessible-device/IP-assignment workflow; afterward the SIMIT firmware column showed a firmware value instead of “Wrong subnet?”. Use the network interface and subnet appropriate to the actual device, and do not copy the example address as a universal setting.

What the status indicates in this case

The report says SIMIT could discover the unit, but changes made after disabling DHCP were not present when the administration dialog was reopened; the firmware column showed “Wrong subnet?”. The user reports that TIA Portal's accessible-node function successfully assigned the IP address and that the firmware indication then became valid. The source does not establish why the original dialog changes failed to persist.

Documented SIMIT V10.2 setup

The Siemens SIMIT V10.2 Operating Manual, section 3.5.6.1, requires the SIMIT Unit to be accessible on the network and SIMIT to be open. The procedure opens the unit-management dialog, searches for available units, and enters the unit name, IP address and subnet mask; the result states that configuration data are saved in the SIMIT Unit.

Assigning an address through TIA Portal

The ticket reports using TIA Portal accessible devices to discover the unit and assign its IP. Siemens TIA Portal examples describe selecting the appropriate network adapter, updating accessible devices, opening Online & Diagnostics, choosing Assign IP address, entering the address/mask and confirming the assignment. Exact labels may vary by TIA release.

Connect the engineering PC to the intended device/network and select the correct Ethernet adapter in TIA Portal.
Refresh the accessible-device list and positively identify the SIMIT Unit by its available device identity/MAC information; do not select a device by IP alone if addresses conflict.
Open Online & Diagnostics and use Assign IP address where supported by that unit and software version.
Enter an address and subnet mask approved for the simulation network. Check for duplicates and ensure the engineering PC has compatible network settings.
Confirm assignment, then reopen SIMIT unit management and verify that the unit is reachable and its displayed address/firmware status is consistent.

Check the subnet before retrying

The ticket gives 192.169.0.10 with mask 255.255.0.0, but this is a user-entered example, not a recommended SIMIT Unit default. Determine the network's assigned address plan and permitted subnet with the responsible network owner. A SIMIT Unit and engineering adapter must have compatible IP addressing for the intended link, subject to the device's supported configuration.

Verification

After address assignment, refresh or reopen the SIMIT unit list and verify the device is reachable, the expected address is shown and the “Wrong subnet?” status has cleared or been replaced by valid firmware information. Then perform the SIMIT-specific setup required for the simulation project. Device discovery and an assigned address do not prove that the simulation coupling or process model is correct.

If the settings still do not persist

Confirm the correct unit is selected, it is reachable on the chosen adapter, the device supports the selected address settings, and no duplicate IP or subnet mismatch exists. Record SIMIT/TIA versions, unit model/firmware and exact status. The ticket does not provide enough evidence to diagnose a save defect in the SIMIT dialog.

Limitations and Operational Precautions

The documented SIMIT procedure is V10.2, while the TIA Portal version and SIMIT Unit model are not provided. The reported TIA assignment is a case-specific resolution; it does not prove that the SIMIT administration dialog is generally defective. IP changes can disconnect a unit or affect other devices; coordinate addressing and avoid using an unapproved subnet.

Engineer FAQ

What does SIMIT V10.2 save during unit setup? Section 3.5.6.1 says the unit name, IP address and subnet mask are configured and saved in the SIMIT Unit.

What did the reported workaround use? TIA Portal's accessible-device discovery and IP-address assignment, after which the reported firmware status appeared.

Should I use the address 192.169.0.10? Not unless it belongs to the site-approved network plan; it is only the address entered in the original report.

Does “Wrong subnet?” prove the SIMIT Unit has failed? No. The source associates the label with the address/subnet situation but does not document its exact diagnostic semantics.

Does a visible firmware value prove the simulation is correct? No. It verifies only a unit identification/status step; validate the SIMIT coupling and project separately.

Technical References

Siemens, SIMIT Simulation Platform V10.2 Operating Manual (03/2020), section 3.5.6.1 “Configuring a SIMIT Unit”: https://support.industry.siemens.com/cs/attachments/109780242/SIMIT_enUS_en-US.pdf
Siemens, SCALANCE configuration with TIA Portal, section 5.1 “Assign IP address on the device” (TIA device-discovery and IP-assignment workflow; confirm applicability to the selected SIMIT Unit): https://support.industry.siemens.com/cs/attachments/109783835/109783835_SCALANCE_TIA_Portal_V1_0_en.pdf