High−level Instructions
3 − 368
Command 03 (DT read) send
Example) When the 6 words of data from DT500 to DT505 is readed from the unit No. 17 of the remote unit,
and a command data to the area starting with DT100 in the local unit is sent from the COM1.
[ F146 (RECV), DT10, DT0, K500, DT100 ]
[S1]:
H0H0 H0 H6
DT10
Specifies No. of transmission words
(H001 to H07F)
Word unit
transmission
*Word units (H0) should be specified for the transmission method of [S1] to read in word units by the
command 03.
[S1+1]:
H1 H1 H1
DT11
Unit No. (H01 to H63)
(1 to 99)
Selects COM port
(H1 or H2)
H0 fixed
Command
conversion
* Specify the data No. of the destination for the starting
No. of read. (Remote unit: DT500)
The quantity to read should be the No. of specified
words. (6−word read)
[S1]: DT10 (DT10=0006H, DT11=1011H)
[S2]: DT0
[N]: K500
[D]: DT100
MODBUS commands
Slave address
Command (03H)
Starting No. of read (H)
Starting No. of read (L)
Quantity to read (H)
Quantity to read (L)
CRC16 (H)
CRC16 (L)
11
03
01
F4
00
06
87
56
1
2
3
4
5
6
7
8
Command 04 (WL, LD read) send
Example) When the 6 words of data from WL20 to WL25 is readed from the unit No. 17 of the remote unit, and
a command data to the area starting with DT100 in the local unit is sent from the COM1.
[ F146 (RECV), DT10, WL0, K20, DT100 ]
[S1]:
H0H0 H0 H6
DT10
Specifies No. of transmission words
(H001 to H07F)
Word unit
transmission
*Word units (H0) should be specified for the transmission method of [S1] to read in word units by the
command 04.
[S1+1]:
H1 H1 H1
DT11
Unit No. (H01 to H63)
(1 to 99)
Selects COM port
(H1 or H2)
H0 fixed
Command
conversion
* Specify the data No. of the destination for the starting
No. of read. (Remote unit: WL20)
The quantity to read should be the No. of specified
words. (6−word read)
[S1]: DT10 (DT10=0006H, DT11=1011H)
[S2]: WL0
[N]: K20
[D]: DT100
MODBUS commands
Slave address
Command (04H)
Starting No. of read (H)
Starting No. of read (L)
Quantity to read (H)
Quantity to read (L)
CRC16 (H)
CRC16 (L)
11
04
00
14
00
06
32
9C
1
2
3
4
5
6
7
8
FPΣ/FP−X/FP0R