Possible Cause:

1. VTR’s control cable is not commutated.

2. RS-422 / RS-232 converter is not supplied.

3. The VTR is in local control mode (Local indicator is on).

 

Solution:

1. Make sure the control cable is properly connected to both the VTR and computer.

2. Make sure the intermediate converter device is power-supplied (its adapter should be connected to the electrical network).

3. Switch the VTR control to Remote.