Hello Everyone! i would like to implement my Drexel & Weiss heating installation (?) in my openHAB installation. They’ve got a Modbus Adapter and i also got a huge pdf with tons of parameters for the Modbus RTU. How can i implement these things now into openHAB? i’m running OH on a Raspberry, and…

@ssalonen putting the .jar file in the addons folder didn’t do the trick i already gave up. so it’s problably not a problem of the binding but my fault! @rossko57 today i tried to implement a r/w register, but it won’t work: modbus.cfg: writemultipleregisters=true serial.slave2.connection=/dev/…

Btw, you probably had similar issues than @nickma82 on this thread : Modbus support for transformations, roller shutter items, read-only items, write-only items, and others - #21 by nickma82 . The solution is given there. Regarding the error you receive, did it work out eventually after retries? …

My German is not good enough with the product manuals to tell if you should now be using modbus id=1 when it worked with id=2 before. On page 5 of the register guide, 202 is shown as read-only. No matter, the failing Modbus function code is 04, read input register, for address CA (202). The error…

[image] rossko57: if you should now be using modbus id=1 when it worked with id=2 before. The document says, that it makes all Modbus devices accessible from within a single (main if you want) Modbus-Connection (in that case the RS232, page 8). That means, if id==2 worked, use that. [ima…

argh, i just checked the log with my initial (working) setup for 202 register… first of all: it didn’t work with id2, but with id1, so that should not be the problem! events.log 2017-04-18 07:40:46.624 [ItemStateChangedEvent ] - Aussen_MB changed from 12503 to 12648 2017-04-18 07:40:46.663 [I…

oh boy, i shouldn’t post on the internet before coffee… id2 didn’t work, id1 did! (post updated!) why do i get a read error for id1? i get regular update on my item but in the same time the error pops up :confused: i’ll take a look at the “chached config files” thread.

[image] narf27: why do i get a read error for id1? If you look at the time stamps, they pop up only every few minutes. So it isn’t broken, just a bit marginal somehow. You see only try 1/3 in error (default allows 3 retries). So try 2 seems to work each time. The error is recovered. Some…

Huh! Modbus Poll is 1,67 minutes. (lowered from 5 mins for testing purpose) The errors appear just a few milliseconds just before the item change is registern in events.log. so you’re probably right and the first try fails but the second succeeds. i’ll take a look at the inter transaction gap - n…

yesterday i tried the 200 register with a read slave. modbus.cfg serial.slave1.connection=/dev/ttyAMA0:9600:8:none:1:rtu serial.slave1.id=1 serial.slave1.type=input serial.slave1.start=200 serial.slave1.length=2 serial.slave1.valuetype=int32 item: Number Aussen_MB "Außentemperatur raw" (Modbus) …

Modbus RTU Drexel & Weiss <> openHAB

Add-ons Bindings

rossko57 (Rossko57) April 18, 2017, 8:16am 50

Okay

So this I don’t understand ?

[quote=“narf27, post:49, topic:22379”] ..
[ERROR] … Last request: 01 04 00 ca 00 02 51 f5
[/quote]

This is a read (FC04) error for ID=1.

I think there is more to it than that

I am not yet an OH2 user, but what a sorry business this seems to be.