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  1. Hi there, Im having issues controlling ATV 320 VSDs over Modbus RTU with a M221 plc, does anyone have any pointers for me to look at? I believe I Have set everything up correctly but when I run the program on the plc the atv's just stay in 'NST' state I have included screenshots if they are any use   My speed reference in this example is taken from the memory word %MW0 which I am inputting via a HMI   I have addressed all my ATVs accordingly in there setting with the correct Modbus parameters and selected Modbus under the FR1 configuration, am I missing anything?? Any help is appreciated as I am really struggling   Tom
  2. Hi guys, I have an M221 and trying to read process data from a HACH controller via Modbus 485. In the Read_Var function block I need to configure ObjType, FirstObj, Quantity and IndexData. Slave ID is 3 and I am using SL2. So, say if I wanted to read to following registers, Register #40001, Data Type Integer, Length 1, Description- Sensor Measure Register #40005, Data Type Float, Length 2, Description - Sensor Temp Register #40007, Data Type String, Length 6, Description - Sensor Name what do I put into the Read_Var function ? I am completely new to this and it's just not clear to me. Thanks John   
  3. Hello I would like to connect 2 HMIGXU 5512 to my Modicon M221 is it possible please?
  4. Hello, I got a new work job to design a cycle tester for a mechanism to make sure will work for at least 5000 cycles open - close. I never made a pls program I start researching few days ago and seams to be very complicate to make it. I have a TM221C16R PLC from Schneider. please help me with some instructions. the cycle tester will have a start pushbutton, stop pushbutton, door open switch, one air cylinder with solenoid to push and pull and a counter. Thank you, Romica