OLDER BTRs with one GREEN LED and Three Red LEDS
If you have the ADR BTR connected right, you will be able to send
and receive data. Should something be wrong, a lot of information
can be derived by observing the four LEDs on the BTR.
||ON when BTR has +5V power
||Blinks when BTR is sending data to PC or
when BTR outputs data to CNC Forward Direction.
||Blinks when BTR outputs data to CNC - either
||Blinks when BTR receives data - goes solid
when file data is in BTR memory.
|Power ON Reset|
|  ||All LEDs flash ON, then DS2,3,4 go out |
|CNC Forward Reading|
|  ||DS2,3 pulse on when CNC reads data|
|CNC Reverse Reading|
|  ||DS2 pulses on then CNC reads reverse|
|  ||DS2 pulses while CNC punches|
|RS422 Multi-drop protocol mode|
|  ||DS4 blinks each time the BTR is polled|