Line couplers, area couplers, and IP routers don't pass every group telegram from one line to the next. Each keeps a filter table - the list of group addresses it lets through - which ETS writes to it when you download the coupler. If a group address is missing from the table, its telegrams stop at the coupler.
SharKNX reads the filter table straight from the coupler's memory and shows it in your project's group address tree, so you can see at a glance what passes and what doesn't.
Before you start
- Load the ETS project that contains the coupler - see Load an ETS Project.
- Connect to a KNX gateway that can reach the coupler - see Connect to a Gateway.
Read the filter table
- On the Project page, open the Devices, Topology, or Buildings tab and tap the coupler. In the Devices tab, the Couplers filter under advanced filters narrows the list to couplers.
- In the device sheet, tap Read Filter Table. It is shown for couplers only - devices whose address ends in
.0, such as1.1.0or1.0.0. - The Filter Table page shows the coupler: its name, address, manufacturer, IP address, and line.
- Tap Read Filter Table. The table is a few KB in size, so reading it takes around 20 seconds.
- SharKNX lists every group address the coupler passes, in the project's group address tree with names and datapoint types.
Understand the results
| You see | It means |
|---|---|
| A group address in the list | The coupler passes telegrams to and from it |
| A group address missing from the list | The coupler blocks it - telegrams on it don't cross this coupler |
| Not found in project | The coupler passes an address that isn't in the loaded project - usually a leftover from an older project version, or a project that doesn't match the installation |
Troubleshooting: a telegram doesn't reach another line
A switch on line 1.1 sends to 1/2/3, but the actuator on line 1.2 never reacts, although the Monitor shows the telegram being sent.
- Read the filter table of the coupler between the two lines - here the line coupler
1.2.0. - Look for
1/2/3in the list. - If it's missing, the coupler blocks it. Usually the group address was linked after the coupler was last downloaded. Download the coupler again in ETS so its filter table is updated.
If the address is in the table and the telegram still doesn't arrive, check the coupler's own settings in ETS - couplers can also be set to block or pass all group telegrams regardless of the table.
Related
- Project Page - the Filter Table page and device sheet
- ETS Projects in SharKNX - what a loaded project unlocks
- Scan a KNX Bus Line - check which devices answer on a line
