Modbus Communication with ABB DCS AC900F
I want to communicate with the ABB DCS Model AC900F using the modbus protocol (using RS485 port or ethernet). Can you give me the modbus table of this device or tell me where i can find it?
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In Freelance the modbus table is dynamically assigned. You should use Modbus Slave Function Blocks, like MODS_W8R, to assign a modbus addresses/numbers to variables. Following the example above You would connect register values You would like to send with modbus to inputs W1 - W8 and then in parameters window assign a proper interface, address and number of registers to be send. This would allow You to access said values by means fo reading them with client under assigned addresses.
To find more info please consult the Engineering Manual - Communication and Fieldbuses, section 5.
Hope this helps,