Filter
Top Products
7 - 29
MELSEC-
A
7 USING FRAMES WHEN EXCHANGING DATA
Special character
code
Details
D9H
During frame transmission, the remote register (RW) value is referred to. The value is interpreted
as a signed value (-32768 to 32767), is converted into a 6-digit decimal ASCII code, and is then
transmitted.
If the RW value referred to has less than 5 digits, the data will be converted into a "space string" +
value ASCII code and transmitted.
If the value is negative, it is transmitted with "–" as the head value, and if positive, it is transmitted
with a "space" as the head character.
FF
H
D9
H
RW
designation
*
1
(Example) When designated RW value is –1234
4
34
H
3
33
H
2
32
H
20
H
1
31
H
-
2D
H
"-1234" is transmitted as ASCII code
Transmission
DAH
During frame transmission, the remote register (RW) value is referred to. The value is interpreted
as an unsigned value (0 to 65535), the last two digits are converted into a decimal ASCII code, and
is then transmitted.
If the RW value referred to has only 1 digit, the data will be converted into a "0" + value ASCII code
and transmitted.
FF
H
DA
H
RW
designation
*
1
(Example) When designated RW value is 1234
4
34
H
3
33
H
"34" is transmitted as ASCII code
Transmission
DBH
During frame transmission, the remote register (RW) value is referred to. The value is converted
into a 4-digit hexadecimal value character string and transmitted.
If the converted value has less than 3 digits, the data will be converted into a "0" + value ASCII
code and transmitted.
FF
H
DB
H
RW
designation
*
1
(Example) When designated RW value is 1234 (4D2H)
2
32
H
D
44
H
4
34
H
0
30
H
"4D2" is transmitted as ASCII code
Transmission
DCH
During frame transmission, the remote register (RW) value is referred to. The last byte of the value
will be transmitted (binary value).
(The high-order byte is not transmitted)
FF
H
DC
H
RW
designation
*
1
(Example) When designated RW value is 16706 (4142H)
B
42
H
"42
H
" is transmitted
Transmission
*1 Refer to section 2) for details on designating RX/RY/RW.