User's Manual

Page 48 FRH-SD07TU/TB Manual
4.2.1.3 Com m unicat ion (1 :1 – 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.
command: @TXT001HELLO CR/LF
2. Master Station returns the response to the terminal equipment.
response: P1 CR/LF
3. Slave Station 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
4. Master station receives the ACK and responds to the terminal equipment
“Successive Completion” response.
response: P0 CR/LF
Master Station Slave Station
Data Transmission
ACK
p
acke
t
Figure 4–2: Communication Configuration (1:1 – Mode 3)
Rev. 050415-01.1