write multiple regs modbus

[anoosheh]

hello

i have labview 2013 and  this library for modbus:

http://www.ni.com/example/29756/en/

and i could write single regs on my board(arduino) but when i want to write multiple regs i dont recieve any data on my lcd

 who can help me ?

[ogk.nz]

Are you receiving any confirmation messages when you have written the values? Specifically after you write the single register correctly what response are you getting?

Other then that, can you show (preferably as a VI or a snippet) the VI that you are using to write the registers?

[anoosheh]

I WROTE in arduino when you recieve holding regs[0]==1 print "hello" in lcd and when i wrote (from modbus labview)holding regs[0]==1 and send it in form"write single  regesters" i see "hello" in my lcd

but when i change it to "write multiple regesters" i dont recieve any data and i cant see any things in my lcd

[Hatef.fouladi]

I do not think you can use this subvi with arduino for modbus protocol
check you arduino with some software like modbus poll software if you could get data with this software then you can use this subvi that relate to one of 2009 lib for modbus

[anoosheh]

tnx hatef for your response

first i use modbus poll and i get the result correctly and then i use labview and it works for single regester but it dosnt work for mutiple regesters...

[Hatef.fouladi]

if you check your data with modbus poll and get answer
the problem that you should check is
1 check address
becouse it change for matiple
2 check your size of data
(in this pic you select address and size1 that is not suit with multiple

[anoosheh]

I CANT get answer for multiple regs in modbus poll too i only get answer for single regs

what is  your mean  abut change adress i want to write from 0 adress why should i change adress however i changed address but i couldent recieve any data on my arduino  and modbus poll error is illegal data address

[Hatef.fouladi]

as i got what you want to do it is better to use arduino toolkit instead of this method