Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

modbus implementation for interfacing MMX12AA9D6F0-0

Status
Not open for further replies.

vahidasadi

Newbie level 3
Joined
Dec 2, 2007
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,302
hi
can enybody help me for modbus implementation for interfacing MMX12AA9D6F0-0 frequency inverter (moeller inverter) with DOP-A80THTD HMI (delta hmi)?
i studied the modbus protocol and i created a frame format and i want to control the driver (inverter ) frequency and its stop ,start with hmi throgh rtu nw (master) interface.
but i have some problems in this theaory, either hmi or inverter don't accept it(i dont know exactly), i.e i cannot read or write any data from/in inverter as a slave.
i done it in rtu nw (master) mode, baud rate:9600,rs485,data bit:8,stop bit:2,parity:none.
i receive the following error when excuting the hmi program:
"come 2 station 2
read error
receive unknown code..."
plz help me in this project
i hope to recieve as soon as your answers.
with best regards
bye.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top