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Hello.
I installed Rapid Scada. I think an excellent tool. But I have a problem with reading data when try using Modbus RTU.
Communication log Modbus TCP = Transmode “TCP”
2015-05-26 12:06:08 Communication session with Device 12 “DT104”, type: KpModbus, address: 1, call number: 10.3.3.72
Request element group “Cuenta”
Send (12): 00 00 00 00 00 06 01 04 00 00 00 02
Receive (7/7): 00 00 00 00 00 07 01
Receive (6/6): 04 04 03 E8 01 D1
OK!Communication log Modbus RTU = Transmode “RTU”
2015-05-26 11:54:25 Communication session with Device 12 “DT104”, type: KpModbus, address: 1, call number: 10.3.3.41
Request element group “Cuenta”
Sending data is impossible because the port is not initialized
Receiving data is impossible because the port is not initialized
Communication error!
Request element group “Cuenta”
Sending data is impossible because the port is not initialized
Receiving data is impossible because the port is not initialized
Communication error!
Request element group “Cuenta”
Sending data is impossible because the port is not initialized
Receiving data is impossible because the port is not initialized
Communication error!The device that want to connect is a Nuflo Scanner 2000 – has RS485 communication. But It is remote, I’ve put a MGate3180 Moxa RS485 to TCP converter.
Another would need to modify data. Can KpModbus.dll library work this way?
Greetings.
In the case of using Modbus RTU you need to create virtual serial port. The most of converters including Moxa supports creating virtual serial ports.
Probably, Moxa converts Modbus RTU to Modbus TCP and the data exchange is correct as you show in the first sample, so you don’t need RTU.ok.
Try again creating a virtual serial port.
I’ll add comments when you have finished making the tests.
Thanks.
Can we write analogue value to the Holding register of the Mod bus device using Rapid Scada.
when i do reverse i.e. – When i change the value in my Modbus simlator , i am able to read the values on the scheme/ web interface , However i not able to find options, which enable me write on the holding register. Help
I can see the commands are only discrete (ON, OFF, START etc.) , there is NO window to fill in the analogue value…
Yes, you should use commands to set Modbus registers. To show a texbox in the command web form, choose empty value in Command values cell of Output channels table in SCADA-Administrator.
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