Lenze FAST: Reaction if the SD card does not have sufficient application credit

Question:

How do I know that there is not enough Application Credit on the SD card?

Antwort:

If the available "Application Credit" is not sufficient to implement your application, the Lenze controller is operated in test mode. Here, the startup time of the boot application on the controller is extended after each restart. The start time can be up to 20 minutes. Except for this restriction, the PLC program can still be used.

The LEDs of the controller flash in test mode as follows:

Error: flashes green/red (5.0 Hz)

Status 1: flashes green/yellow (0.5Hz)

The absence of Application Credit is logged in the controller log, e.g.:

License_Manager: Application starts in 1200 seconds.

License_Manager: Bootapplication needs more Application Credit!

License_Manager: Invalid Lenze license information.

The Lenze controllers c520 and c550 from firmware version V1.9 show the available and necessary Application Credit and their usage on the License Manager page in the Diagnosis Webvisu.

The subsequent increase of FAST Application Credit is possible.
Please check the instructions in the linked AKB article.

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URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/201600261/1/

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AKB-ID: 201600261
Last update: 2025/10/30
Category: FAQ, Tips and Tricks

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