MODICON M221 MODBUS SERIAL COMMUNICCATION

[mohankumar.c]

Hi,

I am unable to read data from SELEC MFM383A-C using RS 485 communication, getting error 

I have configured correctly on serial settings and serial block. Refer below on block diagram and selec meter modbus register address.

IllegalDataAddress

2 (00000002 hex)

The data address received by the slave is not an authorized address for the slave.

 

Please provide solution .

Thanks in advance

[Bosswaffle]

Try 30001 as the "FirstObj" parameter. Some Modbus devices can't agree on whether 0 or 1 is the first register. 

[mohankumar.c]

HI,

Tried with firstobj as 30001 still same error IllegalDataAddress, Object type i have selected as 0x03.

For testing tried firstobj as 0. Here i got read var as 1, agian changed to 30001 same error

Please provide solution