J1939 Interface 6-5
© 2002 HMS Industrial Networks
Document Id:
SCM-7801-026
Receiving Messages
Handled Messages
The following J1939 messages are handled by the AnyBus-X when they are
received from the network.
•
Address Claimed messages are handled by address management. See
“Address Management” on page 6-1.
•
Request for Address Claimed messages are handled by address manage-
ment. See “Address Management” on page 6-1.
•
Request messages referencing a PGNs configured in output data points
trigger message transmission for the associated message. See “Message
Transmission” on page 6-3.
•
Messages with PGNs and source addresses matching configured input
data points trigger an Input table update. See “Input Table Update” below.
Input Table Update
Messages received with a PGN and source address matching that configured for
an input data point will be parsed according to the configured data points.
Input data points are combined according to PGN and Target Address. All input
data points with matching PGN and Target Address are combined to define the
handling for a given message.
If the Target Address is configured as 255, all messages with a matching PGN
will be parsed using the data point, regardless of source address. If the Target
Address is not 255, received messages must match both the PGN and source
address in order to be handled by the input data point. Received messages are han-
dled by all input data points that meet these rules; a given message may be pro-
cessed by more than one input data point.
If a received message passes an input data point’s matching test, the data from its
message buffer is copied to the Input table according to the data point configura-
tion. Data of the configured length is copied from the configured message buffer
offset to the configured Input table offset.
Содержание AnyBus-X J1939
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