How to Update LOGO!Soft Comfort to V8 for LOGO! 6ED1052-0BA6

Overview

Connecting an older engineering laptop to a Siemens LOGO! 6ED1052-1FB00-0BA6 module is the most common field-encountered version-mismatch failure on the LOGO! platform. The 0BA6 suffix identifies the first-generation LOGO! 8 base unit (released 2014), while the engineering tool that originally programmed the panel may still be LOGO!Soft Comfort (LSC) V6.1 - a version that pre-dates the LOGO! 8 firmware protocol and cannot exchange program data with a 0BA6 over any physical interface. The repair is not a cable swap and not a driver reload; the only supported remedy is to upgrade the engineering software to LSC V8.4.1 (or later within the V8 stream) before any PC-to-LOGO! session can be initiated.

This article documents the complete migration path from LSC V6.x to LSC V8 while preserving license entitlements, explains why the historical LOGO! PC cable is no longer sufficient, and lays out a Windows 10 64-bit compatibility strategy that uses the native installer plus a virtual-machine fallback for any project that absolutely requires a pre-V7 toolchain (such as training-program-based or customer-mandated legacy deployments).

Hardware Identification: Decoding the 6ED1052-1FB00-0BA6 Part Number

The Siemens order code carries three fields that determine compatibility:

The 0BA6 hardware has the following connector and indicator layout relevant to the PC connection:

• One front-mounted RJ45 Ethernet socket (10/100 Mbit/s) on the upper face of the unit.
• One mini-USB service port on the lower right face for the LOGO! USB cable.
• A FAIL LED that flashes red/orange when the firmware protocol hand-shake between the LOGO! base module and LSC is in progress.

Reference: Siemens Industry Online Support entry for the 6ED1052 family.

LOGO!Soft Comfort Version Compatibility Matrix

The protocol that LSC uses to upload, download, and monitor programs changed substantially when the LOGO! 8 platform was introduced. Each LSC version knows only the firmware revisions that existed at the time of its release. The compatibility envelope is:

Prerequisites

• Windows 7 SP1 / Windows 10 (64-bit recommended, 32-bit acceptable) or a current Windows 11 distribution that still tolerates the legacy COM-port enumeration.
• Administrator credentials on the engineering laptop (the LSC installer writes to Program Files\Siemens\LOGOComfort_V8 and registers COM/DCOM handlers).
• Source materials one of the following: (a) original V3.1 CD of LOGO!Soft Comfort, (b) an existing licensed install of any earlier LSC version on the same machine, or (c) the appropriate purchased upgrade entitlement from Siemens SIOS.
• Network access for the upgrade download (default site: SIOS entry 109769180 - LOGO!Soft Comfort download).
• An active Siemens customer-account login to obtain the latest Upgrade executable.
• For Ethernet connection: a Cat5e patch cable, the IP address of the LOGO! module (factory default 192.168.0.4 / subnet 255.255.255.0), and a free Ethernet port on the engineering laptop.
• For USB cable connection: the LOGO! USB cable (6ED1057-1AA01-0BA0); the older LOGO! PC cable (serial or COM-port) used with 0BA0-0BA4 units is not wired for the LOGO! 8 mini-USB service port and must not be substituted.

Step-by-Step Upgrade from LOGO!Soft Comfort V6.1 to V8.4.1

1. Extract the existing license. If V6.x is still installed on the engineering PC, note the serial number of the original full license under Help > About. Copy the .LSCW license container from %LOCALAPPDATA%\Siemens\LOGOComfort to a USB stick as a backup. The license file is re-used by V8 - it does not need to be re-purchased for in-place upgrades.
2. Verify your entitlement for the upgrade. The free upgrade path is documented under SIOS 109769180. If an upgrade was purchased separately, locate the license certificate (six-character product key) that came in the original shipment box.
3. Activate / sign in to Siemens SIOS using the customer center account that owns the license. If the original license holder is no longer with the company, the legal entity owning the license must request a transfer through Siemens Customer Support.
4. Download the V8.4.1 V8.4 Upgrade + the V8.4.1 hotfix file from the SIOS download area. The file naming follows the convention LOGOComfort_V8_4_1.zip. Verify the SHA-256 checksum against the value published on the SIOS page to prevent tampered executables.
5. Disable antivirus during installation. Some endpoint security suites flag the LSC installer as a legacy WMI author; this is a false positive, but installation can fail under aggressive HIPS profiles.
6. Install the V3.1 CD or full V8 install first if no LSC version is currently present on the target PC. Right-click Setup.exe, Run as Administrator. Accept the license terms. Default install directory: C:\Program Files\Siemens\LOGOComfort_V8\.
7. Apply the V8.4.1 upgrade over the existing V8 base by running the upgrade MSI. Do not uninstall V6.x first - the upgrade installer reads the V6.x license registry keys to derive a migration key that re-activates V8 against your existing license; uninstalling V6 destroys those keys.
8. Reboot when prompted. The reboot is required for the new WinUsb driver and the LSC service LOGOComfortRemoteService to bind correctly.
9. Launch LOGO!Soft Comfort V8. On first run, choose Tools > Options > Interface and confirm the PC interface is set to the LOGO! USB cable (default) or Ethernet (selectable). The IP address of the LOGO! module must be reachable by ping 192.168.0.4 when using Ethernet.
10. Convert older projects. Open any .lsc file saved in V6.1 - LSC V8 will auto-elevate to .lscp on save. Lift-and-shift projects target 0BA4 hardware, not 0BA6; conversion warnings will appear if the source program references blocks unsupported by the target module.

License Transfer: PC-to-PC Migration

Older LSC licenses are authorized against an immutable fingerprint of the host PC (CPU + BIOS + HDD serial). When the engineering PC is replaced, that fingerprint changes, and the license stops validating. To move an LSC V8 license from one PC to another:

1. From the old PC, open LSC V8 and select Help > License > Activate License > Transfer License back to License Server. The license is returned to the Siemens activation server.
2. Install LSC V8 on the new PC using the steps above.
3. Activate the returned license from Help > License > Activate License. If the license returned cannot be reactivated because the old PC is offline, request a manual reset via Siemens Customer Support with the original Certificate of License PDF.

Cable Selection and Driver Verification

The 0BA6 LOGO! module has two distinct PC interfaces. They are not interchangeable in the field:

Driver verification procedure:

1. Connect the LOGO! USB cable 6ED1057-1AA01-0BA0 to a free USB port. Windows Device Manager should display LOGO! USB Cable (COMx) under Ports (COM & LPT).
2. If the device appears as Unknown Device, right-click and Update Driver > Search automatically for drivers. The Siemens USB-Serial driver is bundled with LSC V8 in C:\Program Files\Siemens\LOGOComfort_V8\Driver\.
3. Confirm the assigned COM port number is below 10. LSC's serial frame parser occasionally has trouble resolving high COM numbers (COM36+). If Windows assigns a high port, change it via Device Manager > Port > Properties > Advanced > COM Port Number.

Windows 10 64-bit Compatibility Workarounds

The LSC V8 installer is signed and officially supported on Windows 10 64-bit. The most common failure modes are:

Ethernet Connection: Preferred on 0BA6 / 0BA7 / 0BA8

The 0BA6 module integrates a 10/100 Mbit Ethernet controller accessible from any system that can route to 192.168.0.4 / 255.255.255.0. For new installations Ethernet is the preferred PC-to-LOGO! channel because it is electrically robust, immune to USB driver regressions, and survives LSC version upgrades without cable swaps.

1. Set the engineering laptop IP address to 192.168.0.50 / 255.255.255.0 via the Windows Network & Sharing Center > Ethernet > Properties > IPv4.
2. Plug a Cat5e patch between the laptop and the RJ45 socket on the top of the LOGO! module.
3. Verify link layer: ping -t 192.168.0.4 should receive a reply within 10 ms.
4. In LSC V8, choose PC > Interface > Ethernet. LSC will auto-discover the LOGO! on the subnet as a UDP broadcast. Click Connect; the firmware version is read back as 0BA6 or later.
5. If auto-discovery fails, manually enter the IP and re-attempt.

Virtual Machine Fallback for Legacy LSC Versions

If an absolute requirement forces the use of LSC V6.x (for example, when reproducing a printed training document or a customer's audited legacy program step), install the legacy version in a Windows 7 32-bit VM rather than the host OS:

1. Download a Windows 7 32-bit ISO from your enterprise VLSC portal or Microsoft evaluation media.
2. Provision a VM using Oracle VirtualBox, VMware Workstation, or Hyper-V. Allocate 2 vCPU, 4 GB RAM, 30 GB dynamic VHDX. Enable USB passthrough for the host's USB ports where the LOGO! USB cable will live.
3. Disable Windows 7 hibernation, disable Windows Update, and disable UAC inside the VM - LSC V6 was written before UAC and the installer can write to non-virtualized Program Files if UAC redirects fail.
4. Install the LOGO! USB cable driver inside the VM using the bundled driver on the V6.1 CD, even though Windows 7 will attempt to auto-install its own generic FTDI driver. Replace the generic driver manually using Device Manager > Update Driver > Let me pick from a list > Have Disk.
5. Route the VM to the same subnet (192.168.0.x) as the LOGO! module by selecting Bridged Adapter in the VM network settings. The VM can then connect to the LOGO! using the V6 tools over Ethernet just as it does over USB.

Take a clean snapshot after a successful install. The VM becomes a portable legacy programming environment that you can ship to any PC without polluting the user's host OS with V6-era COM redirection components.

Connection Verification Procedure

After the upgrade and cable work is done, run this in-line checklist before declaring the migration complete:

1. In LSC V8: PC > Online Test should show PC connected with LOGO! 0BAx along with the firmware revision detected. If the firmware is displayed as unknown but a model is detected, the LSC version is older than the firmware - upgrade LSC to V8.4.1 immediately.
2. Send a PC > Upload from LOGO! command. A green status bar confirms round-trip read.
3. Send a PC > Download to LOGO! command with a non-empty program. The LOGO! will restart into stop mode and back into run mode automatically.
4. Watch the LOGO! display: the Online icon (a small 'eye' in the top right corner of the LOGO! display) confirms LSC is connected.
5. From a terminal run wmic nic where 'NetEnabled=TRUE' get IPAddress and confirm the engineering laptop has the address 192.168.0.x (Ethernet path).

Field-Proven Caveats and Troubleshooting Matrix

Safety and Operational Considerations

Before initiating a download from the engineering laptop, place the controlled process in a safe state according to the P&ID. A LOGO! download interrupts program execution for up to two seconds and forces all outputs to their configured fallback states during the restart cycle. LSC V8 prompts for confirmation; do not bypass this prompt. Reset any watchdog timers and interlocks that the Engineering Workstation may have suppressed during the upload/download phase.

FAQ