Function description
Operating Manual PITreader, PITreader Firmware V1.5.x
1004806-EN-08
| 27
5.9.2 Function codes (Client connections)
The Modbus/TCP Server in the PITreader supports the following function codes (FC):
Function code Function
02 Read Discrete Input The connection Client reads
bit data from the connection
Server,
data length ≥ 1 bit,
(receive data from 1x)
03 Read Holding Register The connection Client reads
word data from the connec-
tion Server,
data length ≥ 1 word,
(receive data from 4x)
04 Read Input Register The connection Client reads
word data from the connec-
tion Server,
data length ≥ 1 word,
(receive data from 3x)
06 Write Single Register The connection Client writes
to a word datum in the con-
nection Server,
data length = 1 word,
(send data to 4x)
16 Write Multiple Registers The connection Client writes
to multiple word data in the
connection Server,
data length ≥ 1 word,
(send data to 4x)
5.9.3 Modbus/TCP data areas
INFORMATION
On the PITreader, the addressing for Modbus/TCP data areas starts at "1".
On other devices, addressing may start at "0".
Please refer to the operating manual provided by the relevant manufacturer.
The product supports the following Modbus/TCP data areas:
} Discrete Inputs (Bit)
PITreader -> Modbus Client, bit access read (with FC02)
Address Content
1x4001 Is authenticated (data from the transponder key)
To Next Page
Loading...
