TCP/IP Error 59/63 in NI LabVIEW to communicate with Eurotherm 3504

[Jalashwa]

Hi Everyone,

I need to control the Temperature of an Oven with LabVIEW with the help of Eurotherm 3504.

I am been trying to figure out the basics of the MODBUS Toolkit as I can connect the LabVIEW to the Eurotherm 3504 with the help of Ethernet.

However, everytime I run a basic VI to read the Data from the 3504, I get a mix of TCP/IP Error 59 / 63, which suggests that the network is down.

Enclosing a snippet of the BD I have been working on,

 Hence, may I please request the attention of folks who have had success with the Eurotherm 3504 or other devices with TCP/IP if they can help me in establishing the connection.

I found a helpful video over the Internet regarding setting up TCP/IP over the Internet. Have attached the link for your kind reference,

https://www.youtube.com/watch?v=H18jsb-mBws

I would be very grateful if anyone could help me figure out as to where I am going wrong.

Kind Regards,

Jalashwa

[GerdW · Accepted solution]

Hi Sindhurakshak,

is there a reason to open and close the connection within each iteration of your loop?

Open the connection before entering the loop, close the connection after leaving the loop!

[Jalashwa]

Hi Gerd,

Thanks for the lightning quick reply.

I am have also tried just having an Open Connection coupled to a close connection without any loop in the hope of just establishing a connection and nothing else.

Hasn't worked out. 

I get an error Initialize Master.vi->Modbus Master.lvclass: Initialize.vi-> API Main.lvlib: Create TCP Master.vi->name of my VI

[GerdW]

Hi Sindshurakshak,

I don't have those MODBus functions installed - but aren't your computer the CLIENT in this MODBus communication?

Your Eurotherm should be the master which serves those read/write requests…

[Jalashwa]

Hi Gerd,

As I have been reading online in the TCP/IP my computer would be the Client which sends the command  and the device wherein it gets implemented is the Server. So my computer is the Master / Client and the Eurotherm is the Slave/ Server.