User manual

Planning Your Application Program
Chapter 6
Function Code 03/04
The function code 03 or 04 is used to read the binary contents of input
registers
Request message format for function code 03 or 04:
Command Body
Station
Address
Function
Code
Start
Address
Start
Address
Requested
Number of Register
Requested
Number of Register
High Byte Low Byte High Byte Low Byte
Example: Read Analog inputs #1 and #2 in addresses 40001 to 40004
as floating point value from ADAM-5000/TCP
01 04 00 01 00 04
Response message format for function code 03 or 04:
Command Body
Station
Address
Function
Code
Byte
Count
Data Data …
Example: Analog input #1 and #2 as floating point values where
AI#1=100.0 and AI#2=55.32
01 04 08 42 C8 00 00 47 AE 42 5D
Function Code 05
Force a single coil to either ON or OFF. The requested ON/OFF state is
specified by a constant in the query data field. A value of FF 00 hex
requests it to be ON. A value of 00 00 hex requests it to be OFF. And a
value of FF FF hex requests it to release the force. Request message
format for function code 05:
Station
Function Coil
Command Body
Coil Force Force Data
Address Code
Address
High Byte
Address
Low Byte
DataHigh Byte Low Byte
Example: Force coil 3 (address 00003) ON in ADAM-5000/TCP
01 05 00 03 FF 00
ADAM-5000/TCP User’s Manual
6-35