cancel
Showing results for 
Search instead for 
Did you mean: 
Reply

EUROTHERM 2604

EUROTHERM 2604

 

 DEAR SIR, I M TRYING TO COMMUNICATE WITH EUROTHERM 2640 CONTROLLER THROUGH NI PCI 8431/8 PORT RS 485 INTERFACE BUT NOT ABLE TO ESTABLISH THE COMMUINACTION . THE PROTOCOL IS  MODBUS AND INTERFACE IS EIA RS 485 ( 2 WIRE) ,NULL MODEM CABLE( CROSS CABLE). FOR COMMUNICATING  I HAVE SORTED THE TX + AND RX + AND TX- RX- . I HAVE TRIED NI MODBUS LIBRARY FOR COMMUNICATING BUT NOT ABLE TO DO THE SAME. ON SEARCHING THIS FORUM I CAME TO KNOW ABOUT THE OPC CONNECTIVTY IS POSSIBLE. I M TOTALLY CONFUSED DONT KNOW HOW TO PROCEED.

0 Kudos
Message 1 of 9
(4,088 Views)

Re: EUROTHERM 2604

Hello Rahul,

 

Can you give a link to your device's documentation? Also, some Modbus devices come with a display that indicates when a connection with the controller is successfully established. Does your device have such an indicator? If yes, then you need to check the connection status before proceeding with the coding.

 

Were you trying to run a specific example for Modbus comunication? Can you post a link to the code, or attach your own code if that is what you're trying?

 

Vaibhav.

Message 2 of 9
(4,051 Views)

Re: EUROTHERM 2604

 

Dear Vaibhav,

 

 

 

 Thanks for your reply. Attached is the Manual of controller(eurotherm 2604) communication on 485( 2wire). for communicating. The eurotherm has got a display in the front along with the programmable keys for programme. I m using modbus libraray to view the data. 

 

while browsing through the manufacturer website i found that there are two ways through which we can commuinacte with the controller  1) digital commuincation on modbus 2) opc link to labview.below is the link where i saw:- http://www.eurotherm.com.au/control/product/x26.htm . The Product link is given below:- http://www.eurotherm.com.au/control/product/2604.htm

 

kindly suggest how to proceed 

0 Kudos
Message 3 of 9
(4,020 Views)

Re : EUROTHERM 2604

Effectively, you can use ModBus or OPC to control 2604 regulator.

 

The simplest way is to setup and to use iTools (& so iTolls OPC Server) provided by Eurotherm. The evaluation version is sufficient.

With iTools, you can get OPC syntaxes and/or ModBus Addresses and reuse information with LabVIEW.

 

To use the 2604 regulator with OPC server, use the DataSocket VIs (in Data Communication palette). Get the URL with iTools Enginneering Studio by selecting a property, then right click and select 'Copy the parameter'. The URL could be reused in labVIEW as OPC address.

 

To use 2604 regulator with ModBus, I use our own ModBus driver but the principle is the same in LabVIEW. Check the addresses in the dedicated column from iTools Engineering Studio. For example, get PV to address '1', set W_SP to address '5', etc...

 

 

Message Edité par J.DECHET le 12-28-2009 10:03 AM
0 Kudos
Message 4 of 9
(3,991 Views)

Re: EUROTHERM 2604

Hi Rahul,The 2604 controller is a vey versatile instrument and you should not have any problems communicating using Serial Modbus or OPC. I am using both on a daily basis to communicate with the controller, the DataSocket Vis together with iTools (iTools OPC server) and our own Serial Modbus  vis for Serial Modbus  RS232 and EIA485.I have also used the NI Modbus library to communicate a 2604 controller without any problems.Before I assist you any further we need to identify if the problem is in the hardware, (i.e. incorrect wiring) or is in the software,( i.e. incorrect  configuration, settings, etc). Therefore can you please give me a detailed diagram of your wiring from the PCI card to the controller including 9 way connector pin numbers and controller comms terminals (i.e. HD, HE, HF.)In addition can you please confirm the following?1)     You have a 458 Communcation module plugged in the controller?2)     The module appears on the controller comms page?3)     You have identical Communication parameters for both the 2604 controller and the PCI card (Baud Rate, Parity, Flow Control)4)     You have the same Slave address in the NI Modbus vi as is set on the 2604?RegardsDimitris
0 Kudos
Message 5 of 9
(3,913 Views)

Re: EUROTHERM 2604

Hello d_n,

 

Can you share the code for controoling the 2604 using RS232?

 

Regards

Regards
Guru (CLA)
0 Kudos
Message 6 of 9
(2,732 Views)

Re: EUROTHERM 2604

hi, I refresh thread

i need control device with et2604

output device has label rs-422

i have card moxa cp 132 which has 2 ports

first set rs-485 (via this port I control et3208 with any problems) second set rs-422

iTools  eurotherm unfortunately show only et3208

where is the problem?

0 Kudos
Message 7 of 9
(2,645 Views)

Re: EUROTHERM 2604

problem solved

i had a mess with my cabel

ps. driver example et32xx you can use 

read and write Modbus

0 Kudos
Message 8 of 9
(2,627 Views)

Re: EUROTHERM 2604

Hello All. I have problem with eurotherm 2604 too.
I cant set SETpoint, I can read data, but if i want to change Programmer/Timer Status it fail on register write.
It fails same way with 24xx and 32xx LV drivers.. I dont have idea what's wrong with it.

0 Kudos
Message 9 of 9
(698 Views)