Resolving Error 2257:1009 Transferring PO Activation File to CPU 410-5H in ALM

Automation License Manager (ALM) Error 2257:1009 during Process Object (PO) activation file (*.rel) transfer to a CPU 410-5H indicates a validation mismatch between the cryptographic release file, the System Expansion Card (SEC) hardware serial number, or restricted target communication modes. When transferring PO expansion packs (e.g., 25x 100 POs), engineers must connect to the target AS controller in ALM with 'Enable expert mode' checked. Furthermore, verifying that the .rel activation file was generated against the exact SEC serial number and that the total licensed PO count does not exceed the hardware ceiling (2,600 POs) resolves the activation failure.

CPU 410-5H PO Licensing Architecture

Unlike modular S7-400 CPUs whose performance is fixed by processor hardware, the SIMATIC PCS 7 CPU 410-5H (6ES7410-5HX08-0AB0) utilizes a single unified hardware platform. Its memory capacity, execution performance, and Process Object (PO) limit are dynamically governed by the System Expansion Card (SEC) inserted into the rear chassis slot.

When a plant expands, engineers purchase CPU 410 Expansion Packs (e.g., 100 POs or 500 POs). The Siemens License Management Web Portal generates an encrypted release file (*.rel) cryptographically bound to the unique hardware serial number of the target SEC. Automation License Manager transfers this file to the CPU over Industrial Ethernet without interrupting controller operation.

Root Causes of ALM Error 2257:1009

The error 2257:1009 - A valid PO activation file could not be transferred originates from three distinct conditions:

Root Cause CategorySpecific Technical FaultCorrective ActionTarget Connection ModeALM connected to AS controller in standard mode with strict communication handshakes enabled.Enable Expert Mode in ALM target connection dialog to bypass strict pre-checks.Cryptographic Serial MismatchThe .rel file was generated using a mismatched SEC serial number (e.g., SEC replaced during maintenance).Audit the physical SEC serial number in ALM and regenerate the .rel file via Siemens License Portal.Capacity Ceiling ExceededThe aggregate PO count (base + expansions) exceeds the maximum CPU 410-5H capacity (2,600 POs).Verify current PO count; a CPU 410 cannot be expanded beyond 2,600 POs.

Resolution Workflow via ALM Expert Mode

To resolve Error 2257:1009 and complete the PO license transfer:

Step 1: Connect to AS with Expert Mode Enabled

Open Automation License Manager (ALM) on the Engineering Station.
In the menu, select Edit -> Connect Target System -> Connect AS....
In the dialog, enter the IP address or ISO/MAC address of the target CPU 410-5H.
Crucial: Select the checkbox labeled 'Enable expert mode'.
Click OK to establish the connection.

Step 2: Validate Target System Information

Select the connected AS station in the ALM left tree view.
Right-click the CPU 410-5H -> select Display PO Information.
Verify that the displayed SEC serial number matches the serial number referenced in your Siemens License Certificate (CoU).
Confirm that the current licensed PO count plus the new expansion quantity (e.g., +2,500 POs) does not exceed 2,600 POs.

Step 3: Execute Activation File Transfer

Right-click the CPU 410-5H station in ALM -> select Transfer PO Activation File... (or Release POs).
Browse to the local directory containing the valid *.rel file.
Click Transfer: ALM writes the cryptographic authorization directly into the non-volatile memory of the SEC.
Confirm that ALM reports: PO activation file transferred successfully.

Procurement Schedule for CPU 410 Expansion Packs

The following Equipment Schedule specifies the relevant order numbers for CPU 410 PO expansion:

CPU Hardware & Expansion Cards:
- SIMATIC S7-400 CPU 410-5H Process Controller: 6ES7410-5HX08-0AB0
- System Expansion Card (SEC) PO 100:            6ES7653-2CA00-0XB5
- System Expansion Card (SEC) PO 500:            6ES7653-2CC00-0XB5
- System Expansion Card (SEC) PO 1000:           6ES7653-2CE00-0XB5
- System Expansion Card (SEC) PO 1600:           6ES7653-2CF00-0XB5
- System Expansion Card (SEC) PO 2600 (Max):     6ES7653-2CG00-0XB5

Expansion Packs (Runtime Upgrades):
- CPU 410 Expansion Pack 100 POs:               6ES7653-2DB00-0AX5
- CPU 410 Expansion Pack 500 POs:               6ES7653-2DC00-0AX5

[!IMPORTANT]
Commercial Accuracy Disclaimer: When upgrading redundant CPU 410-5H pairs (AS 410-5H redundant system), two identical sets of Expansion Packs are mandatory. Both CPUs must maintain exact SEC symmetry (e.g., both 2,600 POs). Attempting to run redundant CPUs with asymmetric PO allocations causes CPU redundancy synchronization to fault. Final license quantities and MLFBs must be validated against the applicable Siemens ST PCS 7 Catalog and authorized distributor quotations.

Verification

To verify that the PO expansion was accepted by the controller:

In ALM, right-click the connected CPU 410-5H -> select Display PO Information.
Confirm that the Total Process Objects field displays the newly expanded limit (e.g., increased by 2,500 POs).
In SIMATIC Manager, open the PCS 7 Multiproject and compile the CFC charts for the target AS.
Open the AS-OS assignment or license utilization dialog: verify that the AS compile dialog reports healthy PO margin without overrun warnings.
In STEP 7, check the CPU Diagnostic Buffer (Ctrl + D): verify that an event indicating successful SEC capacity update was logged.

Limitations and Operational Precautions

Operational boundaries for CPU 410 PO expansion:

Maximum Capacity Ceiling: A single CPU 410-5H controller cannot exceed 2,600 POs under any circumstances. If plant requirements exceed 2,600 POs, an additional AS controller pair must be added to the multiproject.
One-Time Cryptographic Binding: Once a *.rel activation file is applied to a specific SEC, it cannot be reused on another CPU or SEC. The license is consumed.
Redundant System Symmetry: In fault-tolerant AS 410-5H configurations, you must order and activate two identical expansion files—one for each subsystem SEC.

Engineer FAQ

What does ALM Error 2257:1009 specifically indicate?

It indicates that Automation License Manager failed to transfer the PO activation file to the controller, typically due to standard mode communication restrictions or a serial number mismatch with the System Expansion Card.

What does 'Enable expert mode' do when connecting an AS in ALM?

Expert mode bypasses restrictive preliminary firmware handshakes in ALM, enabling direct low-level communication required to write cryptographic release files to the SEC.

Can PO expansion files be transferred while the CPU 410-5H is in RUN mode?

Yes. CPU 410-5H is designed for online PO expansion in RUN (CiR) without stopping the automation process.

What should I do if the SEC was replaced under warranty before applying the PO upgrade?

Contact Siemens Technical Support with your original Certificate of License (CoU) and the serial numbers of both the defective and replacement SECs to have the .rel activation file regenerated.