Summary of VR-5000 setup notes
Speeds of 4800 baud and 9600 baud work OK. 57600 baud does not work - at least it does not work on my receiver. This is believed to be a Yaesu problem with the RX
You need a null modem cable (plug A pin 2 connects to plug B pin 3; plug A pin 3 connects to plug B pin 2; plug A pin 5 connects to plug B pin 5 - all assuming 9 pin D-type connectors).
Note that if you do a RESET of the VR-5000 it will revert to its default speed of 4800 baud. You will have to change it back to 9600 baud if that is your normal operating speed.