Good morning, First of all, I'd like to thank the support team for their help, as I'm aware I submit many questions. I hope this will be my last one.
As I've mentioned several times, I have a building with four logic machines (LMs) located in entrances 1, 2, and 3, as well as the garage. I'm attaching diagrams of the main control panels where the logic machines are located to clarify my question.
As I've mentioned before, I'm also including photos of the KNX installation that controls each LM. As I've also mentioned, LM_P1, P2, and P3 each receive data from 27 sensors and 27 displays, meaning 81 sensors and 81 displays in the entire building.
The issue is that we're having a problem with communication on the KNX bus. Yesterday, we found that the LMs were showing a very high bus load and the number of repeated telegrams was only partially under control.
We made several changes. First, we noticed that the line coupler configuration between the two KNX lines connected to each Logic Machine was set to repeater mode, not line coupler mode. This caused values like the temperature of a floor to repeat up to 13 times. Changing and reprogramming this in ETS6 corrected the issue and reduced the bus load. After that, we found that the bus spikes were caused by the grp.write function, and, following your advice, we replaced it with checkwrite.
Again, the bus load has dropped to an acceptable level between 0 and 20%. The problem is that while the bus load is very stable, the TP repetitions have increased, reaching a peak of 70%. I'll send before and after photos, as well as the configurations in ETS6. The house sensors are from MDT, the touchscreens are from a local company called Zennio and don't seem to be the cause of anything, and the line coupler is from ABB. We'll send everything so our question is explained as clearly as possible. Thank you very much.
The elements of each portal have physical addresses: 1. Portal number.
As I've mentioned several times, I have a building with four logic machines (LMs) located in entrances 1, 2, and 3, as well as the garage. I'm attaching diagrams of the main control panels where the logic machines are located to clarify my question.
As I've mentioned before, I'm also including photos of the KNX installation that controls each LM. As I've also mentioned, LM_P1, P2, and P3 each receive data from 27 sensors and 27 displays, meaning 81 sensors and 81 displays in the entire building.
The issue is that we're having a problem with communication on the KNX bus. Yesterday, we found that the LMs were showing a very high bus load and the number of repeated telegrams was only partially under control.
We made several changes. First, we noticed that the line coupler configuration between the two KNX lines connected to each Logic Machine was set to repeater mode, not line coupler mode. This caused values like the temperature of a floor to repeat up to 13 times. Changing and reprogramming this in ETS6 corrected the issue and reduced the bus load. After that, we found that the bus spikes were caused by the grp.write function, and, following your advice, we replaced it with checkwrite.
Again, the bus load has dropped to an acceptable level between 0 and 20%. The problem is that while the bus load is very stable, the TP repetitions have increased, reaching a peak of 70%. I'll send before and after photos, as well as the configurations in ETS6. The house sensors are from MDT, the touchscreens are from a local company called Zennio and don't seem to be the cause of anything, and the line coupler is from ABB. We'll send everything so our question is explained as clearly as possible. Thank you very much.
The elements of each portal have physical addresses: 1. Portal number.