Communication Format
3-4
INR-244-831
3.5
Explanation of Code
①
STX
The code necessary for the receiver to detect the beginning of a
message. It is put at the beginning of sent characters.
②
Address
The address to which (this product) the master communicates. The
address in a response message from this product shows where the
message is sent.
③
Content
One of two symbols, R or W.
R: Read data from the product
W: Write or store data to the product
④
Identification
The classification symbol (identification code) of read or written data with
3 digit alphabetical ASCII codes. Refer to page 3-9
”.
⑤
Numeric data
Read or written data with 5 digits regardless of its type.
Minus data:
“- (symbol for minus)“ is displayed at the 1
st
digit
Position of decimal point: Not included in 5 digit data.
Ex) The 5 digit numeric data means
Ex.
Meaning of numerical data
Target temp., measured
temp., and offset value
00010: 1.0°C
Control mode
00000: Temperature control enable(Run)
00002: Temperature control diseble(Rdy)
⑥
ETX
The code necessary for the receiver to know the message is complete. It
is put at the end of sent characters (except for BCC).
⑦
BCC
Exclusive OR (EX-OR) of all characters from STX to ETX are taken in.
If
BCC check is set to “no function” in the comunication setting mode of
the product, this code is not included in
the “response message”.
⑧
ACK
The affirmation code included in the
“response message” of the
product; it is sent when the received
“request message” contains no
errors.
⑨
NAK
