HMS AnyBus-X J1939, Руководство пользователя

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Chapter 6
J1939 Interface 6-1
© 2002 HMS Industrial Networks
Document Id:
SCM-7801-026
J1939 Interface
Address Management
The AnyBus-X address management is responsible for bringing the module online
on the J1939 network with a unique network address in accordance to the J1939-
81 specification. The address management will claim a configured address, if pos-
sible, and protect it against lower priority contending address claims. If a config-
ured address is unable to be uniquely claimed, or is lost due to a higher priority
contending claim, the module will be taken offline.
This manual will not discuss the address management protocol in detail; readers
should reference the J1939-81 specification for complete details. The scope of this
section is to explain how the configuration of the address list affects address man-
agement.
Single Configured Address
If a single address is configured in the address list, the module will attempt to
claim that address. If the configured address is successfully claimed, the module
will join the J1939 network using that address. If the address cannot be claimed,
the module remains offline.
Multiple Configured Addresses
If more than one address is configured in the address list, the module will attempt
to claim addresses in the order they appear in the list until it is either successful, or
it runs out of addresses. Once an address is successfully claimed, the module will
join the J1939 network using that address. If an address cannot be claimed, the
module moves to the next address in the list and attempts to claim that address. If
no addresses in the list can be claimed, the module remains offline.