User Manual

DOUT16B-2 Digital Output Module User Manual Page 9 of 13
5.2.2. FUNCTION CODE 03H
Slave address is 64H (decimal 100), starting address is 1 data of 64H (decimal 100) (2 bytes per data).
Table 4 Example Data Address
Address
Data (Hex)
64H
1
Table 5 Function Code 03H Master Request Example
Request
Bytes
Example (Hex)
Slave address
1
64 Send to the slave 64H
Function code
1
03 Read point register
Starting address
2
00 Starting address is 64H
64
Count Number
2
00 Read 1 data (total 2 bytes)
01
CRC code
2
CC CRC code which calculated by master.
20
Table 6 Function Code 03H Slave Response Example
Response
Bytes
Example (Hex)
Slave address
1
64 Respond to the slave 64H
Function code
1
03 Read point register
Read count
1
02 1 data (total 2 bytes)
Data 1
2
00 The content of address 0064H
01
CRC code
2
35 CRC code which calculated by slave.
8C