![modbus poll controller modbus poll controller](https://accautomation.ca/wp-content/uploads/2020/08/Productivity-1000-PLC-to-Modbus-TCP-RTU-Remote-IO-Controller-BX-MBIO-160-min.png)
En este caso activo y desactivo el puerto cuando requiero programar el PLC.
![modbus poll controller modbus poll controller](https://www.aggsoft.com/serial-data-logger/tutorials/modbus-data-logging/images/img1.png)
Imagen 1 y 2: Solo estoy utilizando el puerto que trae de fabrica (no tengo la tarjeta adicional). Publique su código para que podamos echar un vistazo. Si obtiene un valor de 5, entonces el comando Modbus está agotando el tiempo de espera. I am just an extremely satisfied customer. If anyone is interested I use this one. I bought a PC-based Modbus program years ago and it remains one of my best troubleshooting tools.
#Modbus poll controller code#
Post any code that works or doesn't with questions. Poll the Danfoss with the Master program.ĥ.
![modbus poll controller modbus poll controller](https://www.modbustools.com/images/mbpoll-save-copy-series.png)
Establish communication between Unitronics and the Slave PC program.Ĥ. Here are links to limited use Modbus Master and Slave programs that you can download for free:ģ. A quick Google search produced this: but any one with terminals will do.Ģ. Go online and order a USB to RS485 converter for your computer. You want to use a PC because the addresses, lengths, and COM port parameters are super easy to change to try different things.ġ. With this you can hook the two sides together.
#Modbus poll controller software#
I'm afraid you're going to have to set foot in advanced troubleshooting land and do some testing using known software on a PC to gather some known information. Unitronics Vision series can be tricky to set up Modbus on as you have to write your own code to make sure the Modbus task isn't busy, as well as make sure the Rules of Modbus are being followed, as Ofir pointed out. We still don't know which end the problem is on - the Unitronics side or the Danfoss side. This thread has run for a while and you've tried a lot of things. I know I need to read 2 MI to get the required result, could these be returned in the reverse order and if so how do I reverse these. I have tried to store the value into an MI,ML and DW in case there is an issue with data length. If I change the value in the inverter the long number changes on the V1040 indicating that I am reading the correct parameter. If I ask for a parameter on the drive, such as maximum frequency, I get a value such as -14582763 instead of the expected 60hz. I have successfully set up communication between the drive and a V1040 Not sure if I am posting this twice but I have a problem Modbus RTU