OG_MU-4-434_v10e Circuit Design, Inc.
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OPERATION GUIDE
5.4.1.1 @DT Data transmit command 1
The data transmit command 1 ‘@DT’ is a command used for systems that do not use the relay function. Data is
transmitted towards the target station set as the Destination ID at the source station.
1. When the relay function is not used
When the source station MU-4 receives the command from the user controller, it returns a command response as
acknowledgment of receipt of the command. At the same time, it starts wireless data transmission. The target station
MU-4 outputs the data receive 1 in the ‘*DR’ format.
Format: ‘@’ + ‘DT’ + data size + data + ‘C
R
L
F
’
Data size is specified by 2 hexadecimal ASCII characters. The maximum data size that can be sent at one time
is 255 bytes.
The data is a numerical value up to 00h to FFh.
The data is sent to the target station set in the Destination ID: ‘@DI’
Format ‘@DT’ ss DD....D ‘
C
R
L
F
’
ss: Shows the data size in 2 hexadecimal digits Value: 00h to FFh
DD...D: D expresses 1-byte data. Value: 00h to FFh, amount of data: maximum 255 bytes
Example: Transmit the 10 bytes of data (0Ah) ‘0123ABC%#$’ to the target station set in the Destination ID.
The target station Equipment ID = 01h. The source station Equipment ID = 5Fh.
User
controller
DI=01
③Send data
・Source station 5F status
①Issue the data transmit command 1
②Data transmit response
・Target station 01 status
Source
station
EI=5F
Target
station
EI=01
User
controller
@DT 0A 0123ABC%#$ C
R
L
F
＊DT = 0A C
R
L
F
When RI=OF ＊DR = 0A 0123ABC%#$ C
R
L
F
(Default)
④Data receive 1
①
②
④
③Send data
When RI=ON ＊DR = 0A 0123ABC%#$ C
R
L
F
Data receive 1 (Target station output)
Example: Receives 5-byte user data (05h) ‘ABCDE’
Source station = 01, relay stations = 02, when the received signal level is -69 dBm (45h)
Data transmit command 1:
@DT 05 ABCDE C
R
L
F
When SI is OF
*DR = 05 ABCDE C
R
L
F (default)
When SI is ON
*DS = 45 05 ABCDE C
R
L
F
*SI = Attach RSSI information mode
