<![CDATA[LogicMachine Forum

<![CDATA[LogicMachine Forum - Gateway]]> https://forum.logicmachine.net/ Sat, 04 Jul 2026 21:43:56 +0000 MyBB <![CDATA[Modbus device status object stuck at 0]]> https://forum.logicmachine.net/showthread.php?tid=6499 Thu, 02 Jul 2026 12:09:52 +0000 p_xatzi]]> https://forum.logicmachine.net/showthread.php?tid=6499
I have a LΜ5 Lite (Version: 20240426) polling 33 Modbus TCP servers (Siemens LOGO! OBA8), each on a 10-second polling interval.

I'm having a problem with the Modbus status object for these devices. It gets set to 0 at some point, but then it is never set back to 1 when communication is restored (if ever lost) — even though the device is clearly communicating as indicated in Modbus tab.

If I manually reset the status object to 1, it stays at whatever I set it to — it does not get corrected by the driver on the next successful poll. This suggests the driver only writes to it on a state change (communication lost / restored), not on every poll cycle.

In addition, I noticed that the status object drops to 0 exactly at the moment another mapped value on the same server changes, even though that data object is unrelated to the status object. In other words, receiving new data from the device seems to coincide with the status going down.

In my own scripts I never write to these status objects — I only read them.

My questions:

Is there a known issue where the Modbus device status object goes to 0 when new data is received from the server, or when a mapped value changes?
Since the status appears to be updated only on lost/restored events, what happens if a "restored" event is somehow missed — is the object then left permanently at 0?
What is the recommended way to obtain a reliable, real-time connection status for each Modbus TCP device?

Thanks]]>
I have a LΜ5 Lite (Version: 20240426) polling 33 Modbus TCP servers (Siemens LOGO! OBA8), each on a 10-second polling interval.

I'm having a problem with the Modbus status object for these devices. It gets set to 0 at some point, but then it is never set back to 1 when communication is restored (if ever lost) — even though the device is clearly communicating as indicated in Modbus tab.

If I manually reset the status object to 1, it stays at whatever I set it to — it does not get corrected by the driver on the next successful poll. This suggests the driver only writes to it on a state change (communication lost / restored), not on every poll cycle.

In addition, I noticed that the status object drops to 0 exactly at the moment another mapped value on the same server changes, even though that data object is unrelated to the status object. In other words, receiving new data from the device seems to coincide with the status going down.

In my own scripts I never write to these status objects — I only read them.

My questions:

Is there a known issue where the Modbus device status object goes to 0 when new data is received from the server, or when a mapped value changes?
Since the status appears to be updated only on lost/restored events, what happens if a "restored" event is somehow missed — is the object then left permanently at 0?
What is the recommended way to obtain a reliable, real-time connection status for each Modbus TCP device?

Thanks]]> <![CDATA[transmit value via ETH]]> https://forum.logicmachine.net/showthread.php?tid=6497 Thu, 02 Jul 2026 06:18:16 +0000 Frank68]]> https://forum.logicmachine.net/showthread.php?tid=6497 I need to transmit the value of a group address (rain security) from one logic machine to another on the same network. The group address to be transmitted on LM with IP 192.168.0.213 is 1/4/15, which I need to replicate on LM with IP 192.168.0.225 and address 16/6/27.

How can I do this?

Thank you very much.]]> I need to transmit the value of a group address (rain security) from one logic machine to another on the same network. The group address to be transmitted on LM with IP 192.168.0.213 is 1/4/15, which I need to replicate on LM with IP 192.168.0.225 and address 16/6/27.

How can I do this?

Thank you very much.]]> <![CDATA[System overload]]> https://forum.logicmachine.net/showthread.php?tid=6494 Wed, 01 Jul 2026 08:42:18 +0000 stonecroft]]> https://forum.logicmachine.net/showthread.php?tid=6494 Hello.

I have a LM indicating overload (CPU/IO is red values).

system load.pdf (Size: 3.53 KB / Downloads: 7)

The main task of the device is as a Modbus TCP slave to a higher-level system.
I use the script from the documentation and examples.
https://kb.logicmachine.net/integration/...tcp-slave/
In the system load app, this script is the one that consumes the most (about 50%) cpu.

How many registers can be mapped?

]]> Hello.

I have a LM indicating overload (CPU/IO is red values).

system load.pdf (Size: 3.53 KB / Downloads: 7)

The main task of the device is as a Modbus TCP slave to a higher-level system.
I use the script from the documentation and examples.
https://kb.logicmachine.net/integration/...tcp-slave/
In the system load app, this script is the one that consumes the most (about 50%) cpu.

How many registers can be mapped?

]]> <![CDATA[CANx DALI - setting the default color temperature]]> https://forum.logicmachine.net/showthread.php?tid=6493 Wed, 01 Jul 2026 01:44:11 +0000 achang]]> https://forum.logicmachine.net/showthread.php?tid=6493
I am currently using the CANx DALI gateway to control my lighting.
I have a device that can change the color temperature using DT8, and I want to set this device's color temperature at a specific value at all times (i.e 3000K)

However, every time the power goes off and turns back on again, the color temperature goes back to its default value.
I found this parameter configuration where I can set the power on level. Would it be possible to add a parameter for the color temperature upon power on as well?

Screenshot 2026-07-01 at 10.37.23.png (Size: 102.38 KB / Downloads: 26)

]]>
I am currently using the CANx DALI gateway to control my lighting.
I have a device that can change the color temperature using DT8, and I want to set this device's color temperature at a specific value at all times (i.e 3000K)

However, every time the power goes off and turns back on again, the color temperature goes back to its default value.
I found this parameter configuration where I can set the power on level. Would it be possible to add a parameter for the color temperature upon power on as well?

Screenshot 2026-07-01 at 10.37.23.png (Size: 102.38 KB / Downloads: 26)

]]> <![CDATA[Wireguard and routing counter]]> https://forum.logicmachine.net/showthread.php?tid=6471 Fri, 12 Jun 2026 15:47:00 +0000 Andrea Becagli]]> https://forum.logicmachine.net/showthread.php?tid=6471 I have attached a screenshot showing these repeated telegrams. Please note that there are no physical IP routers, line couplers, or any other devices on the network that should be decrementing the routing counter. At first, I thought the electrician had accidentally created a physical KNX loop, but this issue is now appearing across all LMs linked to the WireGuard server.
Has anyone encountered this before? Is this a known bug, or did I misconfigure something in my WireGuard/routing setup? How can I fix this?

Screenshot 2026-06-12 173827.png (Size: 141.11 KB / Downloads: 36)

]]> I have attached a screenshot showing these repeated telegrams. Please note that there are no physical IP routers, line couplers, or any other devices on the network that should be decrementing the routing counter. At first, I thought the electrician had accidentally created a physical KNX loop, but this issue is now appearing across all LMs linked to the WireGuard server.
Has anyone encountered this before? Is this a known bug, or did I misconfigure something in my WireGuard/routing setup? How can I fix this?

Screenshot 2026-06-12 173827.png (Size: 141.11 KB / Downloads: 36)

]]> <![CDATA[Issue with Modbus Profile – Data Not Showing on Mapped Group Address]]> https://forum.logicmachine.net/showthread.php?tid=6461 Wed, 10 Jun 2026 06:31:24 +0000 Ranjeet]]> https://forum.logicmachine.net/showthread.php?tid=6461 Instant Flow and Total Flow values as 4‑byte floating point (float32) objects.
I have successfully tested communication through the Modbus “Read Test” tool in LogicMachine, and the correct data is being received from the meter. However, the mapped group addresses linked to this Modbus profile are not displaying the values — they remain at 0.000.

Could you please advise what might be causing this issue? Specifically, I would like guidance on whether this could be related to:

Datatype mismatch between the Modbus profile and LogicMachine objects
Word/byte order configuration (read_swap setting)
Register addressing for float32 values (two registers per value)
Scaling or multiplier settings

Any insights or recommended adjustments would be greatly appreciated.
Thank you in advance for your support

Screenshot 2026-06-08 184059.png (Size: 35.33 KB / Downloads: 66)

Water Meter.json (Size: 781 bytes / Downloads: 1)

]]> Instant Flow and Total Flow values as 4‑byte floating point (float32) objects.
I have successfully tested communication through the Modbus “Read Test” tool in LogicMachine, and the correct data is being received from the meter. However, the mapped group addresses linked to this Modbus profile are not displaying the values — they remain at 0.000.

Could you please advise what might be causing this issue? Specifically, I would like guidance on whether this could be related to:

Datatype mismatch between the Modbus profile and LogicMachine objects
Word/byte order configuration (read_swap setting)
Register addressing for float32 values (two registers per value)
Scaling or multiplier settings

Any insights or recommended adjustments would be greatly appreciated.
Thank you in advance for your support

Screenshot 2026-06-08 184059.png (Size: 35.33 KB / Downloads: 66)

Water Meter.json (Size: 781 bytes / Downloads: 1)

]]> <![CDATA[LM as KNX/IP interface]]> https://forum.logicmachine.net/showthread.php?tid=6457 Tue, 09 Jun 2026 12:32:42 +0000 dannynos]]> https://forum.logicmachine.net/showthread.php?tid=6457 I (suddenly = in one installation) cannot use the LM5 as a KNX/IP interface (ETS 6 (as well as 5) says: KNX Interface not available; and when "creating" the connection in ETS6 I received a message, that ping was OK but no KNX device description was identified)....
Cannot the cause be the fact, that the LAN in question has a "non-standard" range (to be exact: 53.33.172.xxx) - and LM evaluates the access as "remote" ?
(Note web-access to the editor, visu, etc. works ok; KNX connection itself (TP) as well, settings as "usual").
Have anybody any idea?
Regards
Daniel]]> I (suddenly = in one installation) cannot use the LM5 as a KNX/IP interface (ETS 6 (as well as 5) says: KNX Interface not available; and when "creating" the connection in ETS6 I received a message, that ping was OK but no KNX device description was identified)....
Cannot the cause be the fact, that the LAN in question has a "non-standard" range (to be exact: 53.33.172.xxx) - and LM evaluates the access as "remote" ?
(Note web-access to the editor, visu, etc. works ok; KNX connection itself (TP) as well, settings as "usual").
Have anybody any idea?
Regards
Daniel]]> <![CDATA[BACnet - Notification Class/event-state]]> https://forum.logicmachine.net/showthread.php?tid=6451 Thu, 04 Jun 2026 09:19:40 +0000 tomnord]]> https://forum.logicmachine.net/showthread.php?tid=6451 <![CDATA[Internal DALI finding few ballasts]]> https://forum.logicmachine.net/showthread.php?tid=6436 Fri, 22 May 2026 08:03:13 +0000 PolymorphedCust]]> https://forum.logicmachine.net/showthread.php?tid=6436
I'm trying to use the internal DALI-Gateway (2) on a LM5p2-DW1 but it only finds 1-2 ballasts, even though there are many more connected.

My setup is the LM ^, for DALI PSU I use a https://www.lunatone.com/en/product/dali-ps-en/ and the ballasts are simple DALI-drivers over spots.

I updated the firmware for the LM to version 20251204 for the LM5 Lite + Ext version.
Installed the package genohm-scada-dali_20200722 (I have no idea if this even does anything relevant Smile

)

Then did a "Full scan, set short addresses", but only found 1 ballast. What am I doing wrong?

Next up, is there no feedback-object for these ballasts and can I group them or is that done by scripting/writing to multiple ballasts?

Thanks a lot in advance.]]>
I'm trying to use the internal DALI-Gateway (2) on a LM5p2-DW1 but it only finds 1-2 ballasts, even though there are many more connected.

My setup is the LM ^, for DALI PSU I use a https://www.lunatone.com/en/product/dali-ps-en/ and the ballasts are simple DALI-drivers over spots.

I updated the firmware for the LM to version 20251204 for the LM5 Lite + Ext version.
Installed the package genohm-scada-dali_20200722 (I have no idea if this even does anything relevant Smile

)

Then did a "Full scan, set short addresses", but only found 1 ballast. What am I doing wrong?

Next up, is there no feedback-object for these ballasts and can I group them or is that done by scripting/writing to multiple ballasts?

Thanks a lot in advance.]]> <![CDATA[Alert manager app and alarms0]]> https://forum.logicmachine.net/showthread.php?tid=6435 Thu, 21 May 2026 16:16:55 +0000 ALEJANDRO]]> https://forum.logicmachine.net/showthread.php?tid=6435
I'd like to ask a question, if possible.

I have an alert manager screen on a logic machine, and it needs to display all the alarms from that logic machine and three others.

Initially, I thought about creating standard group addresses using an ETS file, so that the LM_1 alarm addresses would be sent to the LM with the alert manager via IP.

The problem is that these addresses are empty; they have no data. What I'm observing is that the ETS group monitor is generating repetitions on the KNX bus, and I don't want those signals going to the KNX bus.

Is there any way to prevent these GAs from generating repetitions on the KNX bus, or is there a way for the virtual objects created on each LM to send data from one LM to another?

I don't know how to prevent the repetitions, and they are all happening in physical GAs that are empty in the ETS file, without any communication objects from KNX devices. Thank you so much]]>
I'd like to ask a question, if possible.

I have an alert manager screen on a logic machine, and it needs to display all the alarms from that logic machine and three others.

Initially, I thought about creating standard group addresses using an ETS file, so that the LM_1 alarm addresses would be sent to the LM with the alert manager via IP.

The problem is that these addresses are empty; they have no data. What I'm observing is that the ETS group monitor is generating repetitions on the KNX bus, and I don't want those signals going to the KNX bus.

Is there any way to prevent these GAs from generating repetitions on the KNX bus, or is there a way for the virtual objects created on each LM to send data from one LM to another?

I don't know how to prevent the repetitions, and they are all happening in physical GAs that are empty in the ETS file, without any communication objects from KNX devices. Thank you so much]]> <![CDATA[High CPU load on Modbus profile]]> https://forum.logicmachine.net/showthread.php?tid=6434 Thu, 21 May 2026 15:30:57 +0000 iJAF]]> https://forum.logicmachine.net/showthread.php?tid=6434
We are using a Spacelynk to read a lot of variables (140) from a Schneider PLC with a profile json.

If I set the poll interval between 1 and 5 seconds, the CPU is very overloaded and everything seems to be slow:

cpu.png (Size: 2.93 KB / Downloads: 63)

It only gets better (less than 1.0) with more than 6-7 seconds. But I need a faster polling rate for this application.

The profile is communicating fine with the PLC.

Any idea how can we overcome this issue ?

I attach the json used

PLC_Example.json (Size: 22.96 KB / Downloads: 5)

]]>
We are using a Spacelynk to read a lot of variables (140) from a Schneider PLC with a profile json.

If I set the poll interval between 1 and 5 seconds, the CPU is very overloaded and everything seems to be slow:

cpu.png (Size: 2.93 KB / Downloads: 63)

It only gets better (less than 1.0) with more than 6-7 seconds. But I need a faster polling rate for this application.

The profile is communicating fine with the PLC.

Any idea how can we overcome this issue ?

I attach the json used

PLC_Example.json (Size: 22.96 KB / Downloads: 5)

]]> <![CDATA[Multi IP Tunneling]]> https://forum.logicmachine.net/showthread.php?tid=6432 Tue, 19 May 2026 15:00:44 +0000 Domoticatorino]]> https://forum.logicmachine.net/showthread.php?tid=6432 I have a LM that must communicate with no.19 KNX/IP Tunneling devices.

Is it possible set a proper communication with those different IP addresses? How can I set it?

Thanks.

BR]]> I have a LM that must communicate with no.19 KNX/IP Tunneling devices.

Is it possible set a proper communication with those different IP addresses? How can I set it?

Thanks.

BR]]> <![CDATA[Email routing to SIM]]> https://forum.logicmachine.net/showthread.php?tid=6427 Fri, 15 May 2026 12:32:32 +0000 Frank68]]> https://forum.logicmachine.net/showthread.php?tid=6427
I have reactors in which I installed the SIM. The reactor doesn't have direct access to the internet because it's on a segregated network, which guarantees me protected and controlled access from the customer's company PC. I use the SIM to send SMS messages. Is there a way to force the reactor to send emails using the SIM?

Thank you very much.]]>
I have reactors in which I installed the SIM. The reactor doesn't have direct access to the internet because it's on a segregated network, which guarantees me protected and controlled access from the customer's company PC. I use the SIM to send SMS messages. Is there a way to force the reactor to send emails using the SIM?

Thank you very much.]]> <![CDATA[block addresses within the logic machine itself]]> https://forum.logicmachine.net/showthread.php?tid=6425 Thu, 14 May 2026 14:42:14 +0000 ALEJANDRO]]> https://forum.logicmachine.net/showthread.php?tid=6425 <![CDATA[SCADA connection to KNX bus using LM5 and VPN]]> https://forum.logicmachine.net/showthread.php?tid=6423 Wed, 13 May 2026 10:04:58 +0000 Higgel]]> https://forum.logicmachine.net/showthread.php?tid=6423
We have a sentral SCADA system running on Niagara, thats connected to many buildings and in one of them we want to connect to it to the KNX bus.
The SCADA system is connected to the buildings using IXON VPN routers.
We've tried to connect the SCADA system to both KNX-IP routers and a LM5 to get access to the KNX bus but without any success.
We where able to connect to the IP-routers and LM5 using ETS with NAT enabled, it didn't work without NAT.
I was wondering if its possible to connect the SCADA system to the knx bus like I've described?

This is how the topology should look like:

Scada to KNX.png (Size: 24.42 KB / Downloads: 41)

]]>
We have a sentral SCADA system running on Niagara, thats connected to many buildings and in one of them we want to connect to it to the KNX bus.
The SCADA system is connected to the buildings using IXON VPN routers.
We've tried to connect the SCADA system to both KNX-IP routers and a LM5 to get access to the KNX bus but without any success.
We where able to connect to the IP-routers and LM5 using ETS with NAT enabled, it didn't work without NAT.
I was wondering if its possible to connect the SCADA system to the knx bus like I've described?

This is how the topology should look like:

Scada to KNX.png (Size: 24.42 KB / Downloads: 41)

]]>