adccommunitymod (AutomationDirect) asked a question.
DL-260 communicating to ATV71 VFD
Created Date: May 23,2007
Created By: RRSeeTITAN
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I am trying to communicate with a Telemechanique ATV71 VFD using Modbus TCP/IP. My AD system consists of a DL-260 and a H2-ECOM100. I have verified that the the two are communicating. I have contacted both vendors tech support. And both have pointed at an addressing issue with the slave device (VFD). Has anyone attempted this or had any luck with it? Need suggestions....
Created Date: May 23,2007
Created by: jackson
What kind of addressing issue?
More details please...
Created Date: May 23,2007
Created by: RRSeeTITAN
The modbus addresses I am trying to access in the drive are 4-5 digit decimal numbers (i.e. Mains Voltage register logic address is = 3207 (decimal) in the drive)
The AD RX instruction is looking for a Vxxxx memory location.
I have tried all different conversions in the AD documentation to get from Modbus addressing to the DirectSoft addressing.
Created Date: May 23,2007
Created by: franji1
In the slave, is this a "Holding Register " or an "Input Register ". Specifically do you need to use Modbus FC 03 Read Holding Registers or FC 04 Read Input Registers?
Created Date: May 23,2007
Created by: jackson
Try putting V6207 in your RX command box. V6207 is a conversion from 43208 (3207 + 40001). I used the modbus conversion spreadsheet from this website to convert 43208 to V6207.
It looks like the addressing in the drive is just a straight register based value. The conversion spreadsheet from ADC is based upon the Modicon addressing style.
Also make sure that you use Unit ID=0 in the "Peer to Peer Configuration " under the ECOM settings in Netedit for your H2-ECOM100. It looks like there are a few different Modbus Servers in that device. Unit ID=0 is the drives parameters (I believe).
Created Date: May 23,2007
Created by: RRSeeTITAN
THANK YOU JACKSON!! I had already tried that address earlier, but with UnitID = 251, which is what the drive techs told me to use. Once I entered Unit ID = 0 and the V6207, it worked perfectly!! I verified other addresses by taking the Octal value of the decimal logic address. All values looked great, Thanks Again
Created Date: May 23,2007
Created by: RRSeeTITAN
I am trying to communicate with a Telemechanique ATV71 VFD using Modbus TCP/IP. My AD system consists of a DL-260 and a H2-ECOM100. I have verified that the the two are communicating. I have contacted both vendors tech support. And both have pointed at an addressing issue with the slave device (VFD). Has anyone attempted this or had any luck with it? Need suggestions....