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Upgrading S7-417H to CPU 410-5H in SIMATIC PCS 7 V8.1 SP1: Compatibility and Migration Steps

Upgrading S7-417H to CPU 410-5H in SIMATIC PCS 7 V8.1 SP1: Compatibility and Migration Steps

Upgrading a fault-tolerant and fail-safe (FH) controller from an S7-417H to a CPU 410-5H Process Automation under SIMATIC PCS 7 V8.1 SP1 is officially supported, provided the engineering environment includes the required Hardware Upgrade Package (HSP) and S7 F Systems V6.1 SP2. While newer PCS 7 V9.x versions include native catalog support for all subsequent CPU 410 firmware releases, PCS 7 V8.1 SP1 supports CPU 410-5H running firmware versions V8.0 through V8.2. Newer factory-shipped CPUs with firmware V8.2.x can be integrated by maintaining compatible HW Config catalog representations or by aligning firmware. The migration requires matching System Expansion Cards (SEC) for Process Object (PO) licensing, S7 F-Runtime licenses, and recompilation of the Safety Matrix.

Table of Contents

Hardware Compatibility: CPU 417-4H vs. CPU 410-5H Architecture

The SIMATIC S7 CPU 410-5H represents the standard high-performance controller for PCS 7 process automation, replacing classic S7-400H processors:

Dimension / FeatureLegacy CPU 417-4H (6ES7 417-4HT14-0AB0)Modern CPU 410-5H (6ES7 410-5HX08-0AB0)Memory ArchitecturePhysical RAM cards (MC 952); fixed work/code memory partitions.Dynamic unified load/work memory configured via System Expansion Card (SEC).Communication Interfaces2x MPI/DP ports; requires CP 443-1 for Industrial Ethernet.2x PROFINET ports (2-port switch each) + 1x PROFIBUS DP port integrated on CPU face.Execution Performance18 ns bit processing; fixed maximum processing throughput.10 ns ultra-fast bit processing; dynamically scalable PO capacity (100 to 2600+ POs).Conformal CoatingStandard or optional SIPLUS ruggedization.Conformal coating standard across all production units (EN 60721-3-3 Class 3C4).

Software Version and Firmware Prerequisites for PCS 7 V8.1 SP1

Before inserting a CPU 410-5H into a PCS 7 V8.1 SP1 project, verify software package versions:
1. Engineering Station Packages:
- STEP 7: V5.5 SP4 with Hardware Upgrade Package (HSP 245 or later).
- CFC: V8.1 SP1.
- S7 F Systems: V6.1 SP2 (required to support F-execution on CPU 410-5H).
- Safety Matrix: V6.2 or compatible hotfix release.
2. Firmware Compatibility:
- In PCS 7 V8.1 SP1, the hardware catalog supports CPU 410-5H firmware versions V8.0, V8.1, and V8.2.
- If a brand-new replacement CPU arrives from the factory with a newer firmware revision, you can either configure the CPU as firmware V8.2 in HW Config (utilizing backward compatibility mode) or download and flash the matching V8.2 firmware image from SIOS.

System Expansion Card (SEC) and Safety Licensing Requirements

Unlike classic S7-400 CPUs whose capacity was defined by part numbers, the CPU 410-5H hardware is uniform, with functional capacity unlocked via a plug-in System Expansion Card (SEC):
* Process Object (PO) Sizing: Each CPU in an H-system requires an identical SEC card sized to cover the project's total Process Objects (e.g., SEC 500, SEC 1000, or SEC PO 2k+).
* High Availability Requirement: Both redundant CPUs must host identical SEC cards with matching PO capacity.
* Fail-Safe Licensing: For safety-instrumented systems (FH), each controller requires an F-Runtime License (co-licensed with the SEC or via separate license certificates) to authorize safety CRC execution.

Method: Step-by-Step FH Controller Upgrade and Safety Program Migration

Migrating an existing 417H FH station to a CPU 410-5H requires careful hardware and software synchronization:

Step 1: Prepare Project Backup and Document F-Signatures

  1. Archive the entire multiproject in SIMATIC Manager.
  2. Open the existing safety program (Options -> Safety Program).
  3. Record the collective F-Signature, F-runtime group names, and CRC hashes for validation records.

Step 2: Replace CPU in Hardware Configuration (HW Config)

  1. Open HW Config for the primary and redundant AS racks.
  2. If communication relies on older CP 443-1 cards, note that the CPU 410-5H features onboard PROFINET interfaces (PN-IO X5 and X8).
  3. In the hardware catalog, navigate to SIMATIC 400 -> CPU 410 -> CPU 410-5H.
  4. Drag the CPU 410-5H into Rack 0, Slot 3/4. Select Exchange Object.
  5. Repeat the exchange for Rack 1.
  6. Install the high-speed fiber-optic sync submodules into sub-slots IF1 and IF2.
  7. Re-assign the PROFIBUS DP and PROFINET fieldbus subnets to the onboard CPU ports.

Step 3: Reconfigure Safety Program and Safety Matrix

  1. Open CFC and run Options -> Customize -> Compile/Download....
  2. Compile the charts with Generate module drivers checked to generate the modernized @ diagnostic driver blocks for CPU 410.
  3. Open the Safety Program dialog:
    - Assign the F-call execution parameters and verify that execution timing falls within acceptable SIL limits.
    - Click Compile. A new collective safety signature is computed.
  4. If using Safety Matrix, open the matrix, click Transfer -> Compile, and generate the updated matrix CFC charts.

Step 4: Download Hardware and Program to the Controllers

  1. Ensure both CPU 410-5H units have their SEC cards and sync submodules firmly seated.
  2. Switch both CPUs to STOP mode (hardware migration requires a scheduled maintenance window; bumpless hardware replacement from 417H to 410-5H cannot be performed online).
  3. Download the Hardware Configuration via NetPro.
  4. Download the full S7 program (Entire Scope) including safety blocks.
  5. Switch both CPUs to RUN: confirm that the redundant system reaches the RUN-Redundant state.

Verification

To confirm that the upgrade was successful:
- Inspect controller LEDs: both CPU 410-5H units must show RUN (green) on primary and standby units, with the REDUND LED lit and EXTF/INTF LEDs extinguished.
- In SIMATIC Manager, select PLC -> Module Information: confirm the operating mode reads Redundant (1oo2D), memory utilization aligns with SEC limits, and firmware version is verified.
- Open Options -> Safety Program: verify that the safety program is active, the collective F-Signature matches the approved verification document, and safety communication to fail-safe ET 200 distributed I/O is error-free.
- Test OS communication: confirm that WinCC OS servers receive live process data, alarms, and timestamps across the Industrial Ethernet terminal/plant bus.

Limitations and Operational Precautions

  • Mandatory Process Shutdown: Upgrading from S7-417H to CPU 410-5H involves physical backplane module replacement and structural bus alterations. This cannot be done online; a planned plant shutdown is required.
  • Sync Submodule Incompatibility: Fiber-optic sync submodules from the 417H (6ES7 960-1AA04-0XA0) cannot be reused in the CPU 410-5H. You must use the dedicated CPU 410 sync submodules (6ES7 960-1AA08-0XA0).
  • Backup Battery Elimination: The CPU 410-5H utilizes maintenance-free flash memory and internal supercapacitors to retain data, eliminating the need for 3.6V lithium backup batteries in the power supply rack.

Engineer FAQ

Is it possible to upgrade from 417H to 410-5H without stopping the plant?

No. Because the physical CPU, memory architecture, and synchronization submodules differ, a bumpless hot-swap between different CPU generations is impossible. The upgrade requires a planned outage.

Can I run CPU 410-5H on PCS 7 V8.1 SP1 without upgrading the entire DCS to V9.1?

Yes. With STEP 7 V5.5 SP4 and the appropriate Hardware Upgrade Package (HSP), PCS 7 V8.1 SP1 fully supports the CPU 410-5H, allowing facilities to modernize aging controller hardware while keeping operator stations on V8.1.

Where do I obtain the CPU 410-5H firmware update files?

Firmware files are freely downloadable from Siemens Industry Online Support (SIOS entry 109815344 and related delivery notes). Updates can be flashed over Industrial Ethernet using STEP 7 or via memory card.

What happens if the SEC card is removed while the CPU is powered?

Removing the System Expansion Card while the CPU is running is prohibited. The CPU will instantly trip to STOP mode and log a fatal hardware fault in the diagnostic buffer.

Technical References

  • Siemens Industry Online Support: SIMATIC PCS 7 CPU 410-5H Process Automation Manual (109815344).
  • SIOS Entry 109742323: PCS 7 Compendium Part A - Configuration Guidelines (Section: AS Hardware Engineering).
  • SIOS Entry 109809264: SIMATIC Process Control System PCS 7 Released Modules.
  • Siemens Product Delivery Release: SIMATIC S7 F Systems V6.1 Compatibility List.

Related Articles

Related Tags

  • CPU 410-5H
  • S7-400H
  • Fail-Safe
  • S7 F Systems
  • Hardware Migration
  • Safety Matrix
  • Industrial Automation
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