Resolve a CPU 410-5H Redundant PROFINET License Error

The reported download error is associated with using redundant PROFINET R1 distributed I/O on a CPU 410-5H without the required CPU 410 Expansion Pack (PN Red). Siemens documentation identifies that expansion pack as the feature license for redundant PROFINET R1. Confirm CPU firmware, System Expansion Card and license assignment for the exact PCS 7 release before retrying the system-data load.

What the license error means

The ticket reports that SDB 1010 cannot be loaded because no license is available for a redundant PROFINET subnetwork. Siemens describes the CPU 410 Expansion Pack (PN Red) as activating redundant PROFINET configuration R1 for distributed I/O.

Check the documented prerequisite

Siemens lists the USB license key 6ES7653-2CX01-0XE0 and online delivery 6ES7653-2CX01-0XK0. Siemens' PCS 7 V9.1 service manual states the CPU 410-5H expansion-pack upgrade applies from firmware V8.1 or higher and the PN Red option is used for redundancy type R1. Verify the installed firmware and compatible key.

Correct the configuration and license

Confirm the hardware configuration uses R1 redundant PROFINET for the remote I/O.
Check the CPU 410-5H firmware and System Expansion Card (SEC) against the applicable CPU manual.
Confirm the PN Red license key is installed and recognized for that CPU/SEC.
Recompile the hardware configuration and system data.
Load the system data under the site's approved operating-state, backup and rollback procedure.

Verify the result

Confirm SDB 1010 loads without the reported license error. Then verify both redundant PROFINET paths and ET 200SP HA communication using the project's approved diagnostics; a successful load alone does not prove redundancy is functioning.

Limitations and Operational Precautions

The original report does not state CPU firmware or exact PCS 7 release. Confirm current ordering and version applicability before procurement or installation. Loading system data can affect operation; coordinate any live change with the plant.

Technical References

Siemens, Service Support and Diagnostics V9.1, sections 3.5–3.5.2, “CPU 410 Expansion Pack (PN Red)” and CPU firmware applicability: https://support.industry.siemens.com/cs/attachments/109794378/ps7slf_b_en-US.pdf
Siemens, Process automation with the SIMATIC PCS 7 CPU 410-5H controller, Entry ID 96839331: https://support.industry.siemens.com/cs/attachments/96839331/96839331_PCS7_CPU_4105H_V91_en.pdf

CPU 410-5H redundant PROFINET license
ET 200SP HA R1 configuration

Verification

Verify configuration and observable runtime behavior against the intended process requirements.

Engineer FAQ

What exact product version must be confirmed for the CPU 410 PN Red license? Identify the PCS 7, WinCC, STEP 7 and library versions involved, then use documentation applicable to that combination.

Does a reported workaround prove the cause? No. Treat it as a hypothesis until diagnostics or version-specific documentation confirms the cause.

What should be collected before escalation? Record exact versions, affected tags or blocks, diagnostic logs, reproducible steps and the configuration changes already tested.

Should the same procedure be applied to every project? No. Verify that the hardware, software and project configuration match the documented case.

Can a successful compile prove correct runtime behavior? No. Verify the runtime signal or process behavior separately.

Is a parameter change safe to use as a permanent fix? Only when its meaning and effect are understood from applicable documentation and validated for the process.

What is the safest next step when the root cause is unknown? Preserve the current project and capture diagnostics before making further changes.

Does this article claim the issue was reproduced? No. It distinguishes documented behavior from the reported observation and does not claim a lab test.

What operational precautions matter? Use approved change control, backups and rollback planning for changes that affect a live PCS 7 system.

When should Siemens support be involved? Escalate when version-specific behavior or an undocumented error remains after collecting a reproducible diagnostic package.

Resolve a CPU 410-5H Redundant PROFINET License Error