Posts made by CKB

@knebb
Thanks for your reply. Now that I operate the RPis via Mervis OS would you have any idea how the read-only works there?

Thanks &
Regards
CKB

Hi,

I have the same problem. Today there was a power outage and one of my unipi1 SD cards got corrupted as well.
Sometimes it affects just one, but I already had to replace the SD cards at all 4 units at the same time. And it does not matter if it’s a power outage from the DNO or if I just trip my circuit breaker.

I use meanwell power supplies.

Any idea how this can be solved ?

Thanks

Hi,

Another time I stumble over the AI input and issues with reading 0-10V signals with the unipi1 and Mervis.
Is there any FAQ on this because I couldn’t find an FAQ or exemplary project with Mervis and the old unipi1 (but only with neuron, axion etc…) ?
The reason I ask is the conversion linear by two points. I just replaced my old brightness sensor by a new one which makes me rethink the conversion I am currently using -
X1 0
X2 115000
Y1 0
Y2 100

Where do these 115000 come from. Or better question - what is the correct conversion to transform a 0-10V signal to 0-100% with Mervis and unipi1??

Many thanks&
Regards
CKB

Hi there,

I just burned this IC. Can you tell what’s it’s purpose and the part name please ?

Thanks &
Regards
CB

Hi Martin,

'The module (...) is compatible with both Unipi Neuron and Unipi Patron controllers, as well as PLCs from other vendors' - so it's compatible as well with Unipi 1.1 then?

Is there an extension module with only DI planned for the near future?

Cheers
CKB

Guys,

Isn't there any chance to extend the amount of DI to the unipi other than buying more unipis?
In the meantime I have 3 unipis, 1 AO board & 8 relay boards so far. Now I just need more DI to connect additional switches for manual control of the home automation.

Isn't there any elegant, of-the-shelve solution which collects the switch activity locally and communicates it to the unipi through the network (either modbus, sccp or other)?

In the past you had DI extension boards, but more often your products are discontinued, which prevents me to perform an upgrade to Neuron, Axon or other successing PLCs of yours. This makes it difficult for those who supported you from the very beginning...

Any ideas are welcome!

Thanks
CKB

Hi,

since a long time I updated the Mervis IDE version and the OS on the respective Unipi1.1's.
I had 3-5 tasks per Unipi in my solution which worked well, but now after the update the IDE pops an error with having more than 1 task per PLC.

Is that intended or a bug?!

many thanks
CKB

Ahh, just found it - BD18 Bit Composition ! :)

Hi,

quick question - Is there a function block in Mervis that can convert 4 bits (DI01-04) to an integer? I can only find converters with WORD data type as input where I would need to write the 4 digital in's to an array..

Thanks!

@martin-kudláček

I found a capacitive keypad here: https://www.robotshop.com/uk/16-button-capacitive-keypad-module.html
and a module that can connect the keypad via I2C here: https://www.robotshop.com/uk/16-keys-capacitive-touch-ttp229-i2c-module.html

Before I buy it - can UniPi1 cope with this?

Thanks
CB

@martin-kudláček

Thanks for reply and for the link!
I assumed the digital INs could also act as OUTs.. pitty.. :/

Do you know if there's any product that I can buy of the shelve or a product that uses the I2C? It's just a time issue...

Hi,

I want to operate a 4x4 switch matrix with the UniPi1

digital IN/OUT 1-4: matrix rows 1-4
digital IN/OUT 5-8: matrix columns 1-4

I want to iterate now through the digital_IO 1-4, so to check the switch status of each row by reading digital_IO 5-8.

My simple question is: how to code this in ST??
I mean, how to call the unipi digital_IO using a variable?

Thanks a lot for support!

Hi,

I wonder if anyone ever tried to build up a communication between a unipi and a raspberry pi?
As I have a lack of digital ins on my unipi I would like to use the raspberry's GPIOs to forward a switch action to the unipi.

I already have two unipis which communicate over sscp, but I have no idea if and how this can be done with the raspberry.

Any ideas?!

Cheers
CKB

Hi,

I just updated my UniPi1.1 devices to the new 1.7OS using Mervis 74371 and recognized that the Analog Out values have been inverted:
formerly int=10.000 meant 0V and int=0 meant 10V
now int=10.000 means 10V and int=0 means 0V

Did this happen by accident?

BTW - is there a way to smoothen the AO changerate so I can get rid of the steps? (I see it in my light when dimming up and down)
see for instance here:

Thanks
CKB

Found out that EMC was not an issue, but the LED power supply. I added a 10k resistor in parallel to the 0-10V input which fixed the 0V problem.
Only poor thing now is the bad behaviour of Mervis with the AO extension board. I added a ramp for smooth dimm up and down, but it's actually not smooth but rather stepwise:

Any idea how to fix? Maybe the problem comes from the transformation "to_uint(real)" ?

Yes, it’s the old AO add on shown in the picture.
I found out that I can adjust the output voltage from 0-10V with an uint from 0....4095. If I put it 4096 it jumps back to 0V.
Can you confirm ?

Also is it allowed to apply 24V as supply or will it damage the unit?

Right now I am facing the problem of noise injection into the cable at the analog out. Even though I use a PIMPF Cat7 cable (approx 2m long) at the AO, parallel running cables inject a voltage around 0.5...0.6V. I have a LED power supply connected which can be dimmed and which switches on/off at 0.6V and now the LEDs are blinking^^.
Any idea how to improve ? (I know.. I shouldn’t lay the cat7 along with power cables, but I didn’t expect so huge effects. However, I will try to find an alternative route :) )

Hi, can anyone give me a hint how to control the AO Add-on? I mean, what uint value means +10V at the OUT, what uint value gives 0V at the OUT? right now it feels like jeopardy ^^ ..e.g. if I set the channel to uint=10000, I get 4.4V at the OUT. channel transformation is identity, power supply with 5V and 24V for AO

thanks in advance

Hi Tomas, just FYI - Giamba was so nice to help me in a short teamviewer session. It works now fir his example project. Will transfer it to my solution later on :)

Hi, did it work for Giamba? It still doesn't work for me even with the new IDE.. :/