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@derinex The most important changes is described in the newsletter or also in the news on our pages https://www.unipi.technology/news/introducing-the-new-mervis-ide-2-2-0-295

All changes are inlcluded in the builtin changelog of Mervis.

@wavoigt We have tested HMI terminals from weintek like this one https://www.unipi.technology/weintek-mt8051ip-p198?categoryId=29 via Modbus RTU (RS485). Works well but the SW setup is a bit complicated.

Mervis has recently gained BACnet server support so you can connect higher verions of Weintek displays which support BACnet with Neuron or Axon via BACnet/IP

Alternatively Mervis has a web based HMI so you can also use this with any web browser while on the same IP network.

@r3sist thanks for clarification.

The best would be to setup a HMI terminal like this one https://www.unipi.technology/weintek-mt8051ip-p198?categoryId=29

Hooking buttons to DIs would be OK, but you would have to figure out the display since Neuron do not have native support for HDMI or I2C displays.

@beergeek sorry the fwspi should be like /opt/unipi/tools/fwspi -i 0 with root privileges

@beergeek can you paste output of the "dmesg | grep UNIPISPI" command? Would like to know the kernel module version. And what is the firmware version? fwspi -i 0

If you want to call a function(or FB) in a ST, you can create aditional program in ST and call the FB from there.

The display however is a HDMI and cannot be hooked to any DIs.

Hello @derinex,

as I do not know any details about your system, there is hard to help you. B37 is a standard PID regulator without any advanced features (such as integrator limiter - anti-windup, derivation filter nor any kind of auto-tuning). You can try the following:

1. Tune-up PID parameters - e.g. try to turn off the integration (I) and derivation(D) parts or change proportional(P) gain. As an inspiration, you can see the old well-known tuning method by Ziegler-Nichols (https://en.wikipedia.org/wiki/Ziegler–Nichols_method). Unfortunately, these methods may not be sufficient for systems with significant transport delay (which is probably your case).

2. Use a regulator with more advanced structure. But, this kind of FUPLA blocks is not a part of the current version of Mervis IDE. Therefore, you have to compose it of basic blocks (or extend the B37). This approach requires a deep knowledge of the problematic.

I am sorry, but there is probably no simple ready-to-use (or plug-and-play) solution.

Hi @pascal37 ,
sure you can run the python scrip on the same Axon. We do not have a tutorial for that, but once you enable ssh (via service interface or using the new upcomming Mervis IDE) you will have access to a linux machine as you know.

What device is it?

Hello @matrixratrix,
you have to synchronize the state at the boot time by issuing cmd:all