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Dear Mr. Mikhail.
My project based on rapid scada is working well. Now i want to control loads (On-Off) via 8 channel rs485 relay board type R421A08. In my email you said that it can. So how will i configuration of command? Could you help me?
Thanks and best regards
Han HoangTemplate for this relay
In the control channel it is necessary to give the command 1 multiplied by 256, 512 or 768 One turns off, another turns on, the third performs a trigger function. For Example, Cmd*768
you can create buttons for sending commands by writing (I do not know in what place in English) in “command Value” ‘; Off ; On’ or ‘; On ; Off’ without quotes but that at the beginning there was a symbol ; thus in Cmd 1 or 2 will be sent and then in the formula of the control channel to make Cmd*256 and you in one case will be sent 256, in the second case 512.
Dear Han,
Please follow the suggestions written by manjey73. In case of issues, put links to screenshots here.
Dear Manjey73,
Thank you very much for your reply. But there was no result. Now I’ll show you how The relay board R421A08 is connected to rapid scada:The relay board R421A08 is connected to local network via RS485 Ethernet converter (192.168.1.105, address 1)
So my question is: How can I configure the communicator to send commands ?
Here is the screenshot: https://ibb.co/znfB2H8Dear Mikhail,
This is the screenshot of communication line state:
https://ibb.co/SXNXBv6The communication Line parameters is bellowing: https://ibb.co/pnCKF6r
Thanks a lot
Han HoangDoes your interface Converter have a 502 port to work with the RS485 port ?
Also show the Custom Parameters and Request Sequence tabs. And check the documentation, the link to which gave Michael settings for these tabs.
http://doc.rapidscada.net/content/latest/en/software-configuration/communication-with-devices.html
Dear manjey73,
I can not get the result. I change method of connection of relay board R421A08. It was connected with rapid Scada by Modbus RTU via RS485 to USB converter. Before connection with Rapid scada the relay board R421A08 was tested by ModbusPoll. The relay board is working On/Off perfectly. The screenshot is belowing:
https://ibb.co/7vth4qc
https://ibb.co/SnfS8Dg
Now i configure rapid scada that the Relay board was connected with communicator via Modbus RTU and manage to send commands to relay. But not result too. Something is wrong, where? Could you help me? Some screenshots are bellowing:
https://ibb.co/fDx3chS
https://ibb.co/JcDhnGH
https://ibb.co/s2JBzpP
https://ibb.co/W6yYPL8
https://ibb.co/k5yCNHp
https://ibb.co/grmNxvz
https://ibb.co/fXL2TgC
https://ibb.co/zGwRPtc
https://ibb.co/3s3pdRk
https://ibb.co/m4j9WYq
I hope i will get the help from You.
Thanks and best regards
Han HoangWhen there are Bound checkboxes in the settings, the device address is taken from the Scada database. When the checkboxes are removed, the parameters are taken from the Communicator window.
Maybe that’s the problem? do you have an address binding in the Scada database ?
And you send a string, and it is necessary to send Hex
Dear Mạnjey73,
Thank you for your fast reply.
Do you have an address binding in the Scada database ?
No, I have not any address in the Scada database. How to do this, could you let me know?
Thanks a lot
Han HoangDisable the Bound checkboxes in the Communicator Windows and check the line operation.
OR
Configuration Database – table Devices – Address
On the screenshot you can see that Modbus RTU is used. But in the settings there is Modbus TCP. Seems that the screenshots were made in different time with different settings.
What Modbus type is needed, Modbus RTU or Modbus TCP? What is written in the device manual about that?
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