Bb-electronics Command Response Protocol HVD100A3 Manuel d'utilisateur Page 5
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Noté. / 5. Basé sur avis des utilisateurs
HDV100A3 Command & Response Manual-1306cr 1
B&B Electronics -- 707 Dayton Rd. -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Introduction
The HDV100A3 adapter has two modes of operation: J1708 Intelligent and
J1939 Intelligent mode In Intelligent mode the HDV100A3 works with a
command protocol to control different operations of the HDV100A3.
The HDV100A3 performs several functions in the intelligent mode in order
to reduce the overhead and timing requirements of the host application when
communicating with the J1708 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 J1708 bus.
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.
Intelligent Mode Verification
To confirm that the HDV100A3 is in the Intelligent mode, set the host baud
rate to 115.2 KB 8,1,N. The host application can request the vendor number
from the HDV100A3 This is done by sending the following string in hex
from the host to the HDV100A3:
(01, 01, 05, 00, 07)
It will respond as follows:
Hex (01, 0B, 85, MM, DD, MA, M1, M2, MO, 00, VV, VV, 00, DB, CS)
An example of this command can be found on page 12 of this document.
The HDV100A3 does not need to be connected to a vehicle to respond,
however power must be supplied the HDV100A3.
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