Frequently Asked Questions

This could be caused by various reasons. Check if:

  • BEAR is powered up with 9~48V power supply and the status LED is green.
  • RS485 dangle is recognized by your computer and the correct port has been selected.
  • Your baud rate settings in your program as well as your RS485 dangle match your current target BEAR.
  • Signal cable from BEAR to your RS485 dangle is functional.

In most cases this means that you have a very noisy communication. Please check the quality of your signal cables. If you are using a long cable or have a long chain of BEARs, please add a terminal resistor of 120 ohm at the end of the chain, and turn on the terminal resistor switch on your USB2BEAR dangle. But make sure you don’t use the terminal resistor on your USB2BEAR when there is no terminal resistor at the end of the RS485 bus.

In most cases this means that you have a bad signal connection, such as a intermittent connection at the headers. Please check the quality of your signal cables. To avoid damaging your cables, be careful and never pull the cable by the wires. If you need to disconnect your signal header from your BEAR, always pull the header only.

This happens under the following conditions:

  • BEAR is not enabled.
  • BEAR has an outstanding error. This is indicated by a red LED.
  • Your goal command is out of range/out of limits.

Check your error code first. 

Hardware fault is usually caused by a faulty power supply. Disable and then enable your BEAR can clear this error but if the external reasons that triggered the error remain unchanged, there is a high risk that this error will come back.

Joint limit error means the actuator has traveled out of its joint limits. Disable your BEAR and bring it out of the joint limits by revise its joint limit settings or manually moving the output shaft, then re-enable it will clear the error.