Microhard Systems MHX-2400, Руководство по эксплуатации, Страница: 18 / 46

14
MHX-2400 Operating Manual: Chapter 3 Configuration Options
Only one Master can exist
for each network.
S Register 101 - Operating Mode
The Operating Mode (register S101) partly defines the “personality” of the
MHX-2400 module. Allowable settings for this register are 1 through 4 as
follows:.
•
S101=1 Master Point to Multipoint
•
S101=2 Master Point to Point
•
S101=3 Slave
•
S101=4 Repeater
The default for this register depends on which factory default is selected as
shown below:
•
Default for Factory Setting &F1 is 1 (Master Point-to-Multipoint)
•
Default for Factory Setting &F2 is 3 (Slave)
•
Default for Factory Setting &F3 is 4 (Repeater)
•
Default for Factory Setting &F4 is 3 (Slave)
1)Master - Point to Multipoint.
In any given network, there
is always only one Master. All other units should be configured as either
Slaves or Repeaters. When defined as a Point-to-Multipoint Master, the
modem broadcasts data to all Slaves and Repeaters in the network, and is
also the ultimate destination for data transmitted by all Slaves and
Repeaters. In addition, the Master defines the following network parameters
to be utilized by all other modems in the network (See the appropriate
sections for a complete description of these parameters):
n
Maximum Packet Size (S112)
n
Minimum Packet Size (S111)
n
Wireless Link Rate (S103)
n
Hop Interval (S109)
2)Master - Point to Point.
This mode of operation is identical
to Master Point-to-Multipoint, with the exception that the Master only
broadcasts to one particular Slave or Repeater. The modem with which
communication occurs is defined by the Unit Address (S105). For example,
if a Slave has been assigned Unit Address 100, and the Master wishes to
communicate with that Slave, the Master must also be assigned a Unit
Address of 100. If there are Repeaters in the network, they will pass the
packet through to the Slave, and vice versa. Because Repeaters also have
Slave functionality (i.e., a Repeater can be connected to a terminal), the
Master can choose to communicate solely with a Repeater. This would be
accomplished by assigning the same Unit Address to both the Master and
the Repeater.