User's Manual

Page 50 FRH-SD07TU/TB Manual
4.2.2.3 Com m unicat ion (1 :n – Mode 3)
In packet transmission mode, data is transmitted by using the transmit commands (TXT,
TBN, etc.).
1. Master Station transmits a message to Slave Station 1.
command: @TXT001HELLO CR/LF
2. Slave Station 1 receives the message, verifies that the message is addressed to it,
outputs the data to its terminal equipment, and returns an ACK packet to Master
Station.
output: RXT000HELLO CR/LF
3. Slave Stations 2 and 3 also receive the message, but since the destination address
does not match theirs, they discard the data and do not output it to their respective
terminal equipments.
4. Master Station receives the ACK from Slave Station 1.
Slave 1
Slave 2
Slave 3
Master
Figure 4–3: Communication Configuration (1:n – Mode 3)
Rev. 050415-01.1