Hi @daho,
for the toggle functionality you can use the FB "toggle". The rest of the task is simple boolean logic. If the toggle output is true and another DI is false (not true), set the RO to true. Use the FB "and" and "not" for that.
Best regards,
Martin
Hello John-paul,
the communication between Axon and Weintek can be over ModbusRTU or BACnet/IP. I strongly recommend to use the latter - BACnet/IP. For both types communications, we have tutorials for configuration in MervisIDE:
https://kb.unipi.technology/en:sw:01-mervis:weintek-hmi-bacnet-mervis-hidden
https://kb.unipi.technology/en:sw:01-mervis:weintek-ip-series-hidden
Hi @dalibor,
no, the DIs don't have this capability. Mainly because it would require to have DIVCC terminal, to ensure galvanic isolation.
Hello @msoenen,
the Mervis mobile app is available for download in the official stores for Android and iOS. However, to use this app, you need Mervis IDE capable of deploying projects to Mervis SCADA. Currently we are working on release of such Mervis IDE, which, with any luck, will be released to public next month.
Best regards,
Martin
Hello @leif-edh,
due to the Covid 19 quarantine in Czech Republic, I am out of access to the base image which we use for the initial flashing of the NanoPi. Once I will regain access, I can send it to you. Please, bear in mind that this is highly unusual request and I am not able to give you any other support for it and by opening the device, you have effectively lost warranty for the device.
Thank you for understanding,
Martin
Hello @leif-edh, to understand it correctly - you have opened the PLC and connect to the serial interface of the NanoPi?
Hi @dalibor,
we typically sort this out by connecting 24V to the contact 11 of the PIR's relay and connecting the contact 14 (NO) to the DI. Would that pose some problem in your installation?
Best regards,
Martin
Hi @mmcreativ,
the issue might arise, if you try accessing the IP 192.168.8.91 from another subnet. The WiFi interface doesn't have default gateway set, therefor it doesn't know how to reach different subnet. Could this be the issue?
Best regards,
Martin
Hello @pascal37,
I would blame the serial converter first for the disconnecting issue. You said it started to behave like this after 2 months of operation and I guess you haven't tried it for the same amount of time on the second USB port.
Generally, the enumeration of USB devices is dynamic and if you want the device to be enumerated statically, you need to write an udev rule. Try following this tutorial: https://unix.stackexchange.com/questions/91629/symlinks-on-dev-ttyusb-via-udev
Best regards,
Martin
Hello @pascal37,
there isn't a moving average FB per-se, but try looking into the B86 Filter:
Best regards,
Martin
Hello @soren,
that looks like you are using Mervis IDE 2.1.3. If you can, please upgrade to the 2.2.0.
Best regards,
Martin
Hello @jakubch,
you need to create another page in the same template by clicking on the '+' button:
And in the template itself, use the "Button" HMI object:
Best regards,
Martin
Hello @matt90,
the speed of 1ms is very optimistic and in the real life, you will not be able to get it under 10ms with Mervis. The biggest impact on the overall performance has the Autogen functionality and as I can see from the example, you have it configured on all datapoints. Please, take a look at our tutorial about proper settings: https://kb.unipi.technology/en:sw:01-mervis:autogen-hidden
Also, be aware, that the speed is not deterministic, since the program of the PLC is running in the operating system, sharing resources with other processes.
Best regards,
Martin
Hello @rajeshannad,
the ADC chip is MCP3422 which has configurable sampling rate (datasheet). But the sampling rate is not the issue, but rather the fact that the I2C bus is shared with other devices and therefor it is not deterministic.
Best regards,
Martin
Hello @mmcreativ,
have you uploaded the configuration into to PLC afterwards?
The only way to debug this is to SSH into PLC and check the interfaces:
sudo ip a
Best regards,
Martin
Hi @Petr-Hasoň-ml,
can you please share what you have already done? The documentation is quite misleading and wrong at some places, but it should be possible to configure it in the Mervis.
Best regards,
Martin
Hello @roberts_lando,
here is a complete list: https://kb.unipi.technology/en:hw:01-axon:portmap
Best regards,
Martin
Hello @bart-delaere,
the easiest way is to use a simple DIV function block, via which you will divide the setpoint variable value by 10 before sending to AO:
More systematic way, yet more prone to errors, is to use transformation on the write variable:
Best regards,
Martin
Hello @nicola-mondinelli,
I just replied to you via email, I'll repost it here:
Mervis currently doesn't have such functionality. We are about to release an active 1-Wire gateway called xG18, via which you will be able to read 1-Wire sensors without the need of knowing their addresses. This will be released to public by the end of the March / beginning of the April.
The OWFS subsystem is able to detect the sensors, but you still need to know which address belongs to which sensor.
Best regards,
Martin