Murata Electronics North America 2492 사용자 설명서
WIT2492
2000- 2007 Cirronet
17
M-2492-0000 Rev G1
Base
DATA
1110 1001
00HH HHHH
LLLL LLLL
<0-208 bytes data>
Remote
DATA
1110 1001
0000 0000
LLLL LLLL
<0-212 bytes data>
Base
1110
1001 00HH
HHHH LLLL
LLLL
<0-208 bytes data>
Remote 1110 1001
0000 0000
LLLL LLLL
<0-212 bytes data>
3.1. Packet Formats
The byte formats for each packet type are shown in the table below. Packet fields are
organized to fall on byte boundaries. In the case of bit-level fields, most-significant bits
are on the left.
organized to fall on byte boundaries. In the case of bit-level fields, most-significant bits
are on the left.
WIT2400 packet type (mode 04):
Base
DATA
0000
0010 00HH
HHHH LLLL
LLLL
<0-208 bytes data>
0000 0011
Remote
DATA
0000
0010 0000
0000 LLLL
LLLL
<0-212 bytes data>
0000 0011
MRTP (WIT2492) packet types (modes 01-03):
Transmit and Receive:
ID>
Receive only:
CONNECT
1110
1001 10HH
HHHH RRRR
TTTT 00NN
NNNN
<3 byte remote
DISCONNECT
1110
1001 11HH
HHHH 0111
1111
H
: handle number (0-63)
L
: data length (0-208 for base, 0-212 for remote)
N
: remote's previous network number (if roamed)
R
: receive sequence number (from previous cell)
T
: transmit sequence number (from previous cell)
Note that while the packet length can be set to 212, the maximum number of bytes
transmitted per hop is limited to the lesser of 212 or the length specified by maximum data
length. Packets with a data length longer than that will be discarded and not sent. See Get
Maximum Data Length for more details.
transmitted per hop is limited to the lesser of 212 or the length specified by maximum data
length. Packets with a data length longer than that will be discarded and not sent. See Get
Maximum Data Length for more details.
3.1.1. Data Packet
Modes 01 & 02:
Mode 04 (WIT2400):
Base
0000 0010
00HH HHHH
LLLL LLLL
<0-208 bytes data>
0000
0011
0011
Remote 0000 0010
0000 0000
LLLL LLLL
<0-212 bytes data>
0000
H
: handle number (0-63)
L
: data length (0-208 for base, 0-212 for remote)
This packet carries user data. The handle number is the handle of the receiving remote.
When data is being sent from a remote to the base, no handle number is required. Up to
212 bytes (208 for base radios) of user data may be carried per data packet but no more
than is specified by the maximum data length parameter. The radio will not break up a
packet over multiple hops. Packets with a data length greater than maximum data length
When data is being sent from a remote to the base, no handle number is required. Up to
212 bytes (208 for base radios) of user data may be carried per data packet but no more
than is specified by the maximum data length parameter. The radio will not break up a
packet over multiple hops. Packets with a data length greater than maximum data length