ATV320, ATV12 inital settings via modbus

[Cbutz]

We are currently building a application involving either a ATV320 or ATV12. When our application is assembled, our microcontroller should fully manage the ATV via modbus. Starting with initally writing all parameters to it. However we are experiencing difficulties with this. We made a list according to "modified parameters" from somove and set every parameter one by one with our microcontroller via modbus. Afterwards we try to verify the set parameters which fails. It seems some parameters when written reset previously written ones. Is there some sort of depenedency map for all the parameters = which parameter resets which one or how can we get the correct sequence for setting the parameter. Or this there some sort of "lock" mechanism? Currently we loop write over the parameters ten times to ensure all have been set. Can the multiconfiguration be used on the ATV320, but thats missing on the ATV12. How does SoMove handle this behaviour? We dont want to reverse engineer SoMove just to get this behaviour right. Thanks in advance.

[Bastian_Schmitz]

There are some dependencies on values. Especially regarding to motor parameters. Some times the order of writing is important. Unfortunatelly I did not knwo a overview like you mentiont. The best overview for paramters is in these Excel file ATV320   ATV12

Important is that you save the parameters after writing to the eeprom. Sometimes a restart is also helpfull (possible via Modbus).

[Cbutz]

Thank you for these documents, after further inspection, we found a possible solution, yet untested.

The CMI bit 15 seems to be exactly what we need: