B&B Electronics HDV100A3 - Manual - Manual (Page 5)

HDV100A3 Command & Response Manual 1 Cover Page
B&B Electronics -- 707 Dayton Rd. -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Introduction
The HDV100A3 works with a command protocol to send and receive data
from J1708/J1587 and J1939 vehicle networks. Networks can be addressed
individually or to/from both at once if they are both present on the vehicle.
Note that the HDV100A3 is powered from the vehicle side of the interface.
If the device is to be used without a vehicle, it will be necessary to connect
power to the device through the 15-pin connector. Positive voltage is
connected on pin 8. Pin 7 is connected to ground.
Operation
The HDV100A3 performs several functions in order to reduce the overhead
and timing requirements of the host application when communicating with
the J1708 and J1939 bus. The device handles collision detection and retries
with no additional interaction from the host application. This greatly reduces
the processor overhead required by the host in order to communicate
efficiently with the vehicle bus.