Microhard Systems P900 - Protocol Type; Input Framing; Routing Request TTL (Mesh); Mesh Coordinator Rank (Mesh)

© Microhard Systems Inc. Confidential 95
6.0 Register/Command Reference
Values
S218 (MESH) Input Framing
0
Input Framing Type. Controls how the modem treats data coming to its serial
port. Allows the destination address to be embedded into the data stream,
which is automatically stripped by the P900 before transmitting the packet.
0 - Transparent Serial (Default)
1 - Destination Address (DA) is in first six bytes (high byte first) of the
packet. The modems strips these six bytes and doesn't transmit them. For
example, if the DA is 01:23:45:67:89:AB then the high byte is 0x01,the
lowest byte is 0xAB. Note that the max size of the data itself in this case is
S112 minus 6. If S112 = 256 then the max data size is 250 bytes.
Values (1-10000)
S219 (MESH) Routing Request TTL
10 (100ms)
Routing Request Timeout in 10ms ticks. (1-10000). The default is 10, which is
100 msec. This defines how long a unit will wait for a Routing Request to
provide possible routes. During this time no other data may be sent from the
unit. Setting this value too low may not give the system enough time to report
the best path, alternately, a value too high may create latency in the system as
it waits for the TTL to expire before allowing data transmission, although it has
already received the best path.
Values (selection)
S217 Protocol Type
0 - Transparent Serial (default)
1 - Modbus RTU
Defines how data is output on the local serial port. When Modbus RTU is
enabled, there is a delay between the packets coming out of the serial port. The
register S146 defines the delay between individual packets.
Values (selection)
S220 (MESH) Mesh Coordinator Rank
0-3 or,
255
Used with Tx Profiles. Can be set to 0-3 or 255. Value of 255 (default) is for
automatic ranking.
Values (1 - 255)
S221 (MESH) Mesh TDMA Slot to Tx
1
Aloha slot number in mesh TDMA in which the modem will start its transmission
in Tx On Slot channel access mode S244 = 2. 1-255 (default is 1). See the app
note for Mesh TDMA.
Values (selection)
S222 (MESH) Roaming Mode
0 - Disabled
1 - Roaming on Zone/Pattern
When roaming is disabled a mesh radio will synchronize only to a coordinator
with the matching set of S106 and S180. When roaming is enabled the modem
will synchronize with any valid coordinator.