The warning "Maximum number of secured group addresses for this device has been reached" indicates the device's KNX Secure capacity limits are exceeded, not an ETS error. ETS blocks configurations surpassing MaxSecureGroupKeyTableEntries or MaxSecurityIndividualAddressEntries to prevent unsupported setups. To resolve this, disable Secure Commissioning where unnecessary, set group address security to "Forced Off," or consult the product datasheet for KNX Secure capabilities.
What Does This Message Indicate?
The warning "Maximum number of secured group addresses for this device has been reached" pertains to the device’s KNX Secure capacity limits and does not represent an error within ETS.
With recent enhancements to ETS security validation, ETS now more accurately verifies whether a secure configuration is feasible on the target device by assessing the MaxSecureGroupKeyTableEntries and MaxSecurityIndividualAddressEntries parameters.
If the configuration exceeds these limits, ETS will block the operation and display this warning.
When Does This Message Appear?
You may encounter this warning under the following circumstances:
Validation of the MaxSecureGroupKeyTableEntries:
- When the device's IsSecureEnabled property (Application program property) is set to true and Secure Commissioning (an ETS sidebar setting) is enabled.
- When counting all connected group addresses with Security Mode set to On (Forced On) or Auto, and this count exceeds the MaxSecureGroupKeyTableEntries (Application program property).
Validation of the MaxSecurityIndividualAddressEntries (sender):
When a group address is linked to a secure device, ETS evaluates several factors in the background, including:
- Whether secure communication is enabled on the device.
- Collecting all group addresses where the security mode is Auto (except when the group address has no key and is connected to a non-secure device) or On (Forced On).
- For each group address, counting the parent secure device (where IsSecureEnabled and Commissioning are enabled) that is sending the group object.
- Checking if the distinct count of such devices exceeds the MaxSecurityIndividualAddressEntries (Application program property).
If the overall secure configuration surpasses the device’s capacity, this warning is triggered.
Why Does ETS Block the Configuration?
This behavior is intentional.
ETS ensures that: Only configurations supported by the device are permitted.
In other words, ETS prevents configurations that would not operate correctly in real-world scenarios.
What Actions Can You Take?
If you receive this message, consider the following options:
1. Disable Secure Commissioning on devices where security is not required.
2. Set the group address security mode to "Forced Off."
3. Consult the product specification or datasheet for detailed information regarding the device’s KNX Secure capabilities.