CIRCUIT DESIGN MU-4-434, Operation Manual

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OG_MU-4-434_v10e Circuit Design, Inc.
19
OPERATION GUIDE
4.2 System Configuration (When the Relay Function is Not Used)
The MU-4 can be used for building 1:1, 1:N, and N:N systems. Several systems can be operated within the same
area by separating the channels used.
Equipment IDs from 01h to FEh can be specified, and a maximum of 254 MU-4 units can be connected in 1 group.
With 1:1 (1:N) communication, the Destination ID is specified and data is transmitted with data transmit command 1,
however in this case set the route register to “relay function disabled = ‘NA’” using the ‘@RT’ command.
4.2.1 Communication within a group (1:N and N:N systems)
Set the same User ID and Group ID for one group. If the Destination ID specified at the source station and the
Equipment ID of the target station match, data (data receive) is output from the target station.
The diagram below shows a 1:N system, although it is also possible to build an N:N system in which all the units
have an equal relationship.
UI
EI
EI EI
EI
EI
EI EI
EI
GI=8
EI
EI EI
EI
※All equipment in the system has the same frequency channel.
※Communication is not possible between different Group IDs.
EI
EI EI
EI
GI=1 GI=1
GI=1
UI User ID 2bytes
Item name Size
0000-FFFE Set a password
ID value Content
GI Group ID 1byte 00～FF No. 0 to 255
EI Equipment ID 1byte 01～FE No. 1 to 254
※Group ID and Equipment ID can be set freely within the range above.
U I = 0055
GI = 01
EI=02
Source
station Target
station
Target
station
Target
station
U I = 0055
GI = 01
EI=03
U I = 0055
GI = 01
EI=04
U I = 0055
GI = 01
EI=01
Group1 (1:N system)
Same area
Group2 (1:N system)
Group3 (1:N system)
DI=
01
DI=
02
DI=03
DI=01
DI=0
4
DI=0
1
Note: UI = User ID, GI = Group ID, EI = Equipment ID, DI = Destination ID, RT = Route information

Communication between groups
By changing the Group ID for transmitting, it is possible to communicate with another group.

Broadcast communication
If the Destination ID is specified as 00h at the source station and data is transmitted, all target stations will receive
the data at the same time, irrespective of the Equipment ID.