Version 2.0.3 Preliminary Documentation – May be Subject to Change 27-36
4.9.
Miscellaneous Setpoints
NAME Setpoints
The 16 Analog I/O ECU has the following defaults for the J1939 NAME. The user should refer to
the SAE J1939/81 standard for more information on these parameters and their ranges.
Arbitrary Address Capable
Yes
Industry Group
0, Global
Vehicle System Instance
0
Vehicle System
0, Non-specific system
Function
66, I/O Controller
Function Instance
6, Axiomatic AX030200
ECU Instance
0, First Instance
Manufacture Code
162, Axiomatic Technologies Corporation
Identity Number
Variable, based on ECU Serial Number
The only configurable setpoint associated with the NAME is the ECU Instance. Changing this value
will allow multiple ECUs of this type to be distinguishable by other ECUs (including Axiomatic
Electronic Assistant
®
) when they are all connected on the same network.
ECU Address
With this setpoint, the user can change the address of the ECU. The default value of this setpoint
is 128 (0x80), which is the start of the dynamic address assignment range as set by the SAE in
J1939 tables B3 to B7. The EA will allow the selection of any address between 0 to 253, and
it is
the user's responsibility to select an address that complies with the standard
. The user
must also be aware that since the unit is arbitrary address capable, if another ECU with a higher
priority NAME contends for the selected address, the module will continue select the next highest
address until it finds one that it can claim. See J1939/81 for more details about address claiming.
Start PGN
This setpoint allows the user to change the PGNs for all I/O channels by simply changing this
value. The formulas used to calculate the new PGNs are shown below.
Transmit PGNs for AINx = Start PGN + (x-1), where x = 1 to 8
Command PGNs for AOUTy = Start PGN + 8 + (y-1), where y = 1 to 8
If Start PGN >= 65280, then Feedback PGNs for AOUTy = Start PGN + 8 + (y-1), where y = 1 to 8
Otherwise Feedback PGNs for AOUTy = 65280 + 8 + (y-1), where y = 1 to 8
The default value for this PGN is 65280 ($FF00), which is the start of the Proprietary B PGNs. The
allowable range for this setpoint is anything from 0 to 65520 ($FFF0).
It is the user’s responsibility to select a Start PGN that will not result in Transmit PGNs that
will violate the J1939 standard.
WARNING: Changing the Start PGN will reset ALL the PGNs used by the controller,
for both transmit and receive frames. This feature should be used with caution.
