modbus help

[kristine]

Hello Everybody,

I am a last year student at University College Oslo, Norway.
I am having my project where i have to establish ModBus communication between two simulators made in Labview and a PLC (315 2PN/DP). I bought modbus library from it4business, I did everything i could according to manual followed by Modbus Library. I think i have little bit problem in parameterisation of the DBs because i got sucsessfull in establishing connection between PLC and the PC with Labview simulator but problem is that i cannot receive data from simulator.I am using modbus tcp and I have used the modbus example and modified it in labVIEW. Can anybody help me plz having any example of such a program send me at kristinep80@gmail.com ,example followed by Modbus library didnt worked for me, or can anybody help me if i send my copy of program just email me.its urgent

Thanks and Regards
Kristine Pettersen

[SanRac]

HI

If you have establish communication with PLC, then check if you are missing following things.

1. Go to Tools> Options > and select VI server : Configuration

2. Change TCP/IP port to 502

3. Go to VI Server : Machine Access and IP address of another TCP/IP device

Hope this helps