Use the following template to help create your post:
What model of servo are you using?
MX-28 AT protocol 2.0
Describe your control environment. This includes the controller or interface, and any power source.
U2D2 controller ,DELL i7 and Windows-10 , SMPG Source(by Robotis), C++
Specify the operating mode for applicable models, and any firmware settings you are using.
Position Control mode, Time-based profile
Include pictures if possible.
Include a full description of the issue.
Updated the firmware to protocol version 2.0
Finished my C++ setup for Dynamixel motors. When I tried to run read write on a single motor it was working fine but when I try to run the sync-write program it is throwing an error of unable to open the port. Individual motors are working fine but for serial connection it is giving the error. What might be the issue? (Wire connections are good as individual motors in daisy chain connection are working fine.)