Hello Everyone 

I have a project testing communication CPU-214 with the Danfoss inverter (model FC302PK) for reading and writing data from the inverter. I tried configure by reading the manual and was so lucky to find this guide link below. But I didn't  succeed for that. 

Does anyone have experience doing that before pls give me some advice, thank you so much.

https://plc247.com/siemens-s7-200-modbus-rtu-danfoss-fc302-inverter/

Hi,

Perhaps you can give some information what goes wrong?

Do you have STATUS information?

Best regards,

Wizard

Wizard

Hi,

Perhaps you can give some information what goes wrong?

Do you have STATUS information?

Best regards,

Wizard

 Hi thank you for relying.

I dont get any feedback from MBUS_MSG instruction. 

 I even don't understand why he can use data mapping like that.Ưhy he can get Address 450010 for frequency or 416140 for current data? Sorry because of my knowledge .

Hello,

Perhaps this link might help:

How do you implement MODBUS communication with S7-200?

And the manual Modbus RTU (Danfoss)

AQ361181101347en-000101.pdf

Best regards,

Wizard

Be sure the modbus connection is correct and all properly configured.

The guide you mentioned is a (crude) way to get the inverter working and to let you see how Modbus is working. (In slow motion)

The commands (MBUS_MSG) need to be transmitted in sequence, hence the used timers to loop trough the commands.

If you look at the Modbusmanual user Wizard provided, you can see page 16 for address meaning 50000 and 50010 and see page 32 for parameter 1612 ect.

FYI
Control words are working in bits and the related info you can find on page 24:
MSB (15) <-->LSB (00)
0000010001111100 fwd (1148)
1000010001111100 bwd  (33916)
0000010000111100 stop (1084)
0000010010111100 reset (1212)

Do a binary to DEC calculation and you get a value used in the example for address 50000.

And another thing. The Voltage output address 400001 + 16119 = 416120 makes no sense to me because 41612 = Motor Voltage according the the manual.

Hope this helps you.

Wizard

Hello,

Perhaps this link might help:

How do you implement MODBUS communication with S7-200?

And the manual Modbus RTU (Danfoss)

AQ361181101347en-000101.pdf

Best regards,

Wizard

 Thank you so much, Mr.Wizad. Your manual link helped me a lot.

Henry1675

Be sure the modbus connection is correct and all properly configured.

The guide you mentioned is a (crude) way to get the inverter working and to let you see how Modbus is working. (In slow motion)

The commands (MBUS_MSG) need to be transmitted in sequence, hence the used timers to loop trough the commands.

If you look at the Modbusmanual user Wizard provided, you can see page 16 for address meaning 50000 and 50010 and see page 32 for parameter 1612 ect.

FYI
Control words are working in bits and the related info you can find on page 24:
MSB (15) <-->LSB (00)
0000010001111100 fwd (1148)
1000010001111100 bwd  (33916)
0000010000111100 stop (1084)
0000010010111100 reset (1212)

Do a binary to DEC calculation and you get a value used in the example for address 50000.

And another thing. The Voltage output address 400001 + 16119 = 416120 makes no sense to me because 41612 = Motor Voltage according the the manual.

Hope this helps you.

 Thank you, Mr.Henry. You help me understand Word Control.

Could you tell me where to get "16119" for detailed data? Or should we subtract back by holding register CPU S7-200 and VFD Data

Like i mentioned. The 40001 + address calculation makes no sense. 16119 does not exist 1612(0) does exist according to the manual.

Try put the vfc in manual/local/jog mode to enable it and edit the program try only read one address. ie. VFC hour meter, DC link voltage, rpm. ect.  Easy recognizable values.
If you got the connection working, add more addresses.

Monitor the error status of MBUS_CTRL and MBUS_MSG to see of the connection is working and use Microwin Build in help to diagnose it.

TheHai_Arts

 Thank you, Mr.Henry. You help me understand Word Control.

Could you tell me where to get "16119" for detailed data? Or should we subtract back by holding register CPU S7-200 and VFD Data