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DNT24 Integration Guide - 10/19/11
c. Configure the number of child slots per hop on the base by setting the
NumSlots
parame-
ter. The default is 3 slots.
d. Set the required hop duration on the base. The
HopDuration
parameter in Bank 0 con-
trols hop duration. The default is 20 ms.
11. Configure the slot lease on the base by setting the
SlotLease
parameter. The default is 4 hops.
12. Set the heartbeat interval as required in each system radio. The parameter that controls heart-
beats is the
HeartBeatIntrvl
in Bank 0. The default is 20 seconds/heartbeat.
13. Enable end-to-end message ACKs where required by setting the
EndToEndAckEnable
parameter
in Bank 0 to 1. Enabling this parameter provides a confirmation that a message has reached its
destination in peer-to-peer or store-and-forward routing. The default is disabled.
14. Set the message retry limit on the base with the
ArqAttemptLimit
parameter in Bank 1. The de-
fault value is 6 retries.
15. Set the link drop threshold on the base by setting the
LinkDropThreshold
in Bank 1. This parame-
ter sets the number of sequential hops without receiving a beacon that will trigger a child to
resynchronize and re-link to its parent. The default is 10 hops.
16. Set the point-to-point reply timeout on the base in the
P2PReplyTimeout
parameter in Bank 1.
The default is 16 hops. See Section 7.4.2 for parameter details.
17. Configure the registration timeout on the base by setting the
RegistryTimeout
parameter in
Bank 1. The default timeout is 50 hops. See Section 7.4.2 for a discussion of this parameter.
18. Load an optional “friendly description” in each system radio in the
UserTag
parameter, Bank 0.
4.5 Configuring a Store-and-Forward System
The following additional parameters must be set to configure a DNT24 store-and-forward system:
1. Configure the DNT24 radios designated to be routers by setting the
DeviceMode
parameter
in Bank 0 to 0x02.
2. Enable store-and-forward operation on
all
system radios by setting the
Store&ForwardEn
parameter in Bank 0 to 0x01.
3. In each router, load a unique base-mode network ID into the
BaseModeNetID
parameter in Bank
0, and into the base if a router is set to 0x00.
4. To configure a specific system topology, set the parent network ID parameter,
ParentNwkID,
and
optionally the alternate parent network ID parameter,
AltParentNwkID
, in all routers and
remotes. Note that a store-and-forward system topology can be formed either automatically or
manually, based on the settings of the
ParentNetworkID
and optionally the
AltParentNwkID
parameters:
- Setting the
ParentNwkID
parameter to 0xFF in all routers and remotes allows each
router and remote to automatically link to a parent, causing the system to form
automatically (child routers picking each other as a parent cannot occur). In this case, the
AltParent-NwkID
parameter should be set to 0xFF, which disables it.
