Problem Communicating with Siemens G120 Drive Using MODBUS


Thread Starter


Hai this is surendra,

currently i am working on MODBUS communication protocol. I facing a problem with in sinamics G120 drive. My objective is i need to rotate the motor speed with different RPM's from the drive. For this i write the reference speed some 1000 rpm. This reference speed is successfully updates to the belonging register, and i wrote the control word with 047F to activate the speed set point and enable all remaining parameters. When i write the control word register, at that time the drive should be on. But it is not happening. where i am doing the fault in this? and what should i do now? please suggest me on this issue.