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## Single Shunt Current Measuring

Level 3
Level 3

Hi@ Krupashankar

I am Trying to Read IU current Value when I send Command

Note: Motor is Stop mode not running

0x01,0x05,0x01,0x7A,0x00,0x00,0xFE,0x80

0x1,0x85,0x1,0x7A ,0xF9,0xFF,0x5,0x1

Motor Ampere iU = FFF9,in decimal = 65529

again Send

0x01,0x05,0x01,0x7A,0x00,0x00,0xFE,0x80

0x1,0x85,0x1,0x7A,0x5,0x0,0xF9,0x0

Motor Ampere iU = 5,in decimal = 5

I don't understand Why I get FFF9 value?

when I run motor  got Correct Rpm by reading Register   0x7D; // Motor speed Register 125=7D

but IU current give 40,60,70 Reading & also FFC9 or different value FF

PL guide what I am doing Wrong & From where FF values came.

Thanks

1 Solution

## Re: Single Shunt Current Measuring

Moderator
Moderator

Hi @sohail,

Register Iu is a signed 16-bit value representing the current in the U phase so you are reading both positive and negative current.

For more details please refer to section 3.2.7.1 Iu in iMOTION SRM.

Please let us know if further details is needed.

Thanks,

Krupashankar

3 Replies

## Re: Single Shunt Current Measuring

Moderator
Moderator

Hi Sohail,

Thanks for reaching to us, please provide the iMOTION controller and the evaluation board used for this project?

Best Regards

Attachments are accessible only for community members.

## Re: Single Shunt Current Measuring

Level 3
Level 3

Hi,

I am Using I motion2GO Board.

## Re: Single Shunt Current Measuring

Moderator
Moderator

Hi @sohail,

Register Iu is a signed 16-bit value representing the current in the U phase so you are reading both positive and negative current.

For more details please refer to section 3.2.7.1 Iu in iMOTION SRM.

Please let us know if further details is needed.

Thanks,

Krupashankar