hello experts,

  i am new for modbus communication i have done program with help of sample project in library,

 in cp341 both Tx ,Rx Led is blinking  in send block it show error 00e62 & in HW diagnostics

 buffer it show F  1:Reply message with Modbus Exception Code 02: Illegal Data Address

i think in plc program side only mistake , i have attached my modbus mapping detail in below

in my slave device it reacive message without error from plc and it also transmite with error message

i want to get 5 flow transmitter value from my slave 

my slave device Emerson wireless gateway

slave adrs is "1"

register address 40001,40003,40005,40007,40009 

Please help

Hi 

ModBus Error 2 means there is a communication but the Data address is not correct.

Please make for us the Modbus mapping with excel sheet and attach it to us to better helping 

Hi,

i have upload my program for modbus in below file.

if anything i did worng in program please tell....

Hi Kaulquappe,
    

                       I consider it is for start & end address for slave. ok i will make it as" 0" for both adr_high

& adr_low, after that it will read data from slave  or i have to change any thing??

so in sample project  why they mention as  adr_high & adr_low in Source DB how it will work.

Hi,

      I make it both add_high & add_low as 0  but now also show same error  0e62

I have attached error in below file

Please help me

Hi,

Problem has solved now working every thing fine thank you for your support

gs1993

Hi,

Problem has solved now working every thing fine thank you for your support

Hi,

I'm too facing the same problem,can you please share how to solve that error?