Migrating Between SIMATIC PCS 7 BOX 416 and BOX RTX - Hardware Compatibility and WinAC Slot CPU Integration

Migrating or reusing hardware components between a damaged SIMATIC PCS 7 BOX 416 (6ES7650-2MB07-0YX0) and a replacement PCS 7 BOX RTX (6ES7650-4AA00-0AA0) involves fundamentally distinct controller architectures. The legacy BOX 416 utilizes a physical PCI coprocessor card (WinAC Slot CPU 416-2 PCI, 6ES7616-2EK00-0AB0), whereas the BOX RTX utilizes a purely software controller (WinAC RTX) executing on the Windows real-time kernel extension without slot hardware. While the physical CPU 416-2 PCI card can be installed into an available PCI slot on compatible IPC chassis, PCS 7 V8.x and higher discontinues slot CPU support, mandating migration to WinAC RTX software controller configurations.

PCS 7 BOX Architecture - BOX 416 (Slot CPU) vs BOX RTX (Software Controller)

Siemens SIMATIC PCS 7 BOX compact solutions package the Engineering Station, OS Server/Client, and controller into a single industrial PC:
* PCS 7 BOX 416 (6ES7650-2MB07-0YX0): Utilizes a dedicated PCI plug-in card: WinAC Slot CPU 416-2 PCI (6ES7616-2EK00-0AB0). The slot CPU runs autonomously with onboard memory and DP interfaces, executing even if Windows crashes.
* PCS 7 BOX RTX (6ES7650-4AA00-0AA0): A pure software-based controller. It runs SIMATIC WinAC RTX as a hard real-time sub-system operating in parallel with Windows via the IntervalZero RTX real-time extension, utilizing the PC's onboard PROFINET/Ethernet and CP 5611/5622 interfaces without needing slot CPU hardware.

Hardware Compatibility and Operating System Constraints

When attempting to transplant a CPU 416-2 PCI card into a newer BOX RTX chassis:
1. Physical Slot Limitations: Newer IPC chassis (e.g. IPC427D / IPC627D) frequently feature PCIe slots only or lack the physical depth and 5V PCI signaling required by legacy full-length PCI cards.
2. Operating System and Driver Incompatibility: WinAC Slot CPU 416-2 PCI drivers exist only for 32-bit Windows XP and Windows Embedded Standard 2009. There are no signed 64-bit drivers for Windows 7 (64-bit) or Windows Server operating systems used in PCS 7 V8.1/V8.2.
3. Product Lifecycle: The Slot CPU line reached end-of-life status. Official migration from Siemens replaces slot hardware with WinAC RTX or standalone S7-400 / CPU 410-5H controllers.

Migration Procedure from WinAC Slot CPU 416-2 to WinAC RTX

Follow this procedure to migrate a damaged BOX 416 to a functioning BOX RTX:

[Phase 1: Backup and Adapt HW Config in STEP 7]
   │  • Open the original project in SIMATIC Manager
   │  • In HW Config, select the PC Station object
   │  • Replace the "WinAC Slot 416" object in Slot 2 with "WinAC RTX"
   │  • Re-map PROFIBUS DP lines from the slot CPU onboard DP port to the
   │    integrated CP 5611 / CP 5622 PROFIBUS interface on the BOX RTX chassis
   │
[Phase 2: Reconfigure PC Station Components via Station Configurator]
   │  • On the physical BOX RTX unit, launch Station Configurator
   │  • Index 2: Assign "WinLC RTX"
   │  • Index 3: Assign "IE General" or "CP 5622"
   │  • Index 4: Assign "WinCC Application"
   │
[Phase 3: Compile and Download Program]
   │  • In HW Config: Station -> Save and Compile
   │  • In CFC: Execute "Chart -> Compile -> Entire program" with module drivers
   │  • Download Hardware Configuration and S7 program to the local WinAC RTX controller
   │  • Start WinAC RTX from the system tray controller panel

Procurement Notice: Validate all final license quantities, media packages, and part numbers against current Siemens Industry Mall catalogs and with an authorized Siemens distributor quotation prior to procurement.

Controller Architecture and Replacement Comparison Matrix

Compare technical specifications between the two PCS 7 compact architectures:

Architectural DimensionPCS 7 BOX 416 (6ES7650-2MB07-0YX0)PCS 7 BOX RTX (6ES7650-4AA00-0AA0)Controller TypeHardware PCI Coprocessor Card (Slot CPU)Software Controller (WinAC RTX)Controller MLFB6ES7616-2EK00-0AB06ES7671-0RC08-0YA0 (Software License)Real-Time EnvironmentOnboard ASIC microprocessorIntervalZero RTX Real-Time SubsystemWindows Crash ResilienceContinues execution independentlySurvives Windows blue-screen with NVRAM bufferSupported OSWindows XP / WES 2009 (32-bit only)Windows 7 Ultimate / Embedded (32 & 64-bit)PCS 7 Version SupportPCS 7 v6.0 to v7.1PCS 7 v7.1 to v8.2

Verification

To confirm that the migrated PCS 7 BOX RTX operates properly:
1. Open the WinAC RTX control panel on the desktop; verify status indicates RUN with a green indicator.
2. In STEP 7 HW Config, go online; verify that all distributed ET 200M stations show healthy communication.
3. In WinCC Explorer, verify that the OS Runtime communicates with WinAC RTX across the internal Softbus.
4. Verify that analog and discrete control loops execute within the scheduled cyclic interrupt OBscan time.

Limitations and Operational Precautions

Never install a legacy Slot CPU card into a modern IPC without verifying PCI bus power supply specifications; improper voltage levels can permanently damage the motherboard. In WinAC RTX systems, always equip the industrial PC with a non-volatile RAM (NVRAM) buffer module to prevent data loss during power outages. Plan long-term migration from WinAC RTX to hardware controllers (CPU 410-5H), as WinAC is phased out in PCS 7 V9.0 and higher.

Engineer FAQ

Can I physically plug the CPU 416-2 PCI card into the BOX RTX?

Only if the specific BOX RTX chassis model has an available legacy 32-bit PCI slot. However, because modern PCS 7 versions lack 64-bit drivers for the card, the software will not recognize it.

What license is required for WinAC RTX?

WinAC RTX requires a dedicated runtime license (e.g. SIMATIC WinAC RTX V4.6, 6ES7671-0RC08-0YA0) installed via Automation License Manager.

Does WinAC RTX continue running if Windows crashes?

Yes, provided the PC is configured with the RTX real-time kernel extension, WinAC RTX continues deterministic execution even if Windows encounters an operating system crash.