How to Resolve Grayed-Out CPU 410-5H Controllers in Automation License Manager for Process Object Upgrades

In SIMATIC PCS 7 V8.1, the issue where a CPU 410-5H (6ES7410-5HX08-0AB0) controller appears grayed out and unselectable in Automation License Manager (ALM) during 'Edit > Connect Target System > Connect AS410' occurs due to navigation selection errors or unmet software prerequisites. In ALM's target connection browser, engineers must switch to Component View and select the individual CPU container object under the S7 Program rather than selecting the top-level multi-project or AS station container. Furthermore, dynamic Process Object capacity upgrades via ALM strictly require SIMATIC PCS 7 V8.1 or higher, CPU 410-5H firmware V8.1+, and an online Industrial Ethernet connection to the CPU's integrated PROFINET interface.

Architecture of CPU 410 System Expansion Cards (SEC) and Dynamic POs

The SIMATIC CPU 410-5H Process Automation controller (6ES7410-5HX08-0AB0) introduced a revolutionary hardware paradigm:
* The Single Hardware Standard: A single high-performance hardware CPU module covers all plant sizes from 100 Process Objects (PO) up to 2,600+ POs.
* The System Expansion Card (SEC):
* Hardware capacity is governed by a physical System Expansion Card inserted into the rear of the CPU module.
* Base SEC cards come in defined PO tiers (e.g., 100 PO, 500 PO, 1,000 PO, 1,600 PO, 2,000 PO, or 2,600+ PO).
* Dynamic Online PO Expansion (CPU 410 Expansion Packs):
* Plant expansions can increase PO capacity in increments of 100 POs or 500 POs while the plant remains in RUN mode.
* The upgrade license is transferred directly from the Engineering Station into the controller's SEC card via Automation License Manager (ALM).

Prerequisites for Online AS410 Connection in Automation License Manager

To enable ALM to communicate with the CPU 410-5H:
1. Software Version Requirement: SIMATIC PCS 7 V8.1 or higher (V8.0 does not support online SEC expansion via ALM).
2. CPU Firmware Version: CPU 410-5H firmware must be at least V8.1 (earlier V8.0 firmware requires a firmware update before SEC expansion).
3. Network Connection:
* The ES must communicate over Industrial Ethernet (TCP/IP) directly to the CPU's integrated PN-IO port.
* Communication through an external CP 443-1 is not supported for SEC license loading; the connection must terminate on the CPU's onboard PROFINET interface.
4. License Key Availability: The purchased CPU 410 Expansion Pack license (e.g., 100 PO or 500 PO) must reside on the local hard drive of the Engineering Station in ALM.

Component View Navigation Rules for Target Controller Selection

The most common reason a CPU appears grayed out is an interface navigation mistake in ALM:

The Selection Mistake:
In ALM, selecting Edit > Connect Target System > Connect AS410 opens the project hierarchy browser.
If the user selects the multi-project root folder (2014Q112_Prj) or the AS station folder, the right pane displays the CPU as grayed out with a disabled selection checkbox.
The Correct Selection Rule:
1. In the tree dropdown, set the display filter to Component View.
2. Expand the multi-project -> Expand the sub-project container (e.g., K1).
3. Expand the SIMATIC 400 Station -> Click on the specific CPU 410-5H object.
4. The right column immediately highlights the CPU in active black text with an enabled checkbox, allowing the engineer to proceed.

Step-by-Step SEC Process Object Upgrade Procedure

To execute the online Process Object upgrade:

Connect Target Controller in ALM:
* In ALM, navigate to Edit > Connect Target System > Connect AS410.
* Browse to the CPU in Component View and click OK.
* ALM queries the physical SEC card over the network and displays current license state:
- Current Licensed PO Count (e.g., 1,000 PO).
- Current Utilized PO Count (e.g., 980 PO).
Transfer Expansion Pack License:
* In ALM's local drive list, locate the purchased SIMATIC PCS 7 CPU 410 Expansion Pack 100 PO.
* Drag and drop the license key directly onto the connected AS410 target node.
Online License Activation in Controller:
* The SEC card verifies the digital signature of the license key and increments its internal hardware counter.
* The controller immediately reflects the expanded capacity (e.g., 1,100 PO) in RUN mode without requiring a CPU stop or warm restart!

Comparison of CPU 410 SEC Capacity Tiers and License Types

The table below outlines CPU 410 System Expansion Card capacity tiers and expansion packages.

SEC Package / Expansion PackCapacity ScopePart Number (MLFB)License TypeExpansion MechanismSystem Expansion Card 100 POBase 100 PO6ES7653-2CA00-0XB5Hardware KeyPhysical card in CPUSystem Expansion Card 500 POBase 500 PO6ES7653-2CC00-0XB5Hardware KeyPhysical card in CPUSystem Expansion Card 1000 POBase 1,000 PO6ES7653-2CE00-0XB5Hardware KeyPhysical card in CPUCPU 410 Expansion Pack 100 PO+100 PO Upgrade6ES7653-2CC01-0XE5Electronic LicenseLoaded via ALM in RUNCPU 410 Expansion Pack 500 PO+500 PO Upgrade6ES7653-2CD01-0XE5Electronic LicenseLoaded via ALM in RUN

Verification

To confirm that the CPU 410-5H license expansion succeeded:
1. In ALM, inspect the connected AS410 target: verify that Licensed POs reflects the new higher total.
2. In SIMATIC Manager, select the multi-project: right-click and choose PCS 7 License Information.
3. Verify that the AS Process Object table indicates licensed capacity equals or exceeds configured PO count.
4. Perform a delta compilation and download of CFC charts (PLC > Download > Changes Only).
5. Confirm that the download succeeds without license shortage warnings and the CPU remains in RUN.

Limitations and Operational Precautions

Once an electronic Expansion Pack is loaded into an SEC card, the license is permanently bound to that specific physical card; it cannot be transferred to another CPU or returned to the PC.
Never remove the System Expansion Card from the rear of the CPU while the controller is powered on; card removal will cause an immediate controller stop.
If replacing a failed CPU 410 module, transfer the original physical SEC card into the replacement CPU chassis to preserve all licensed Process Objects.
Always validate final Process Object calculations and Expansion Pack ordering numbers against the applicable Siemens catalog and authorized distributor quotation.

Engineer FAQ

Why is my CPU 410-5H grayed out in ALM?

You selected the top-level project folder instead of navigating down to the individual CPU object in Component View, or your CPU firmware is older than V8.1.

Can I upgrade CPU 410 Process Objects while the plant is operating?

Yes. Online PO expansion is a signature feature of CPU 410; Expansion Packs are transferred via ALM in RUN mode without interrupting active process control.