Pilz PNOZ mm0p 24VDC - Manual (Page 96)

Modbus/TCP
Operating Manual PNOZmulti communication interfaces
1001154-EN-13
96
Function
code Function
FC 04 Read Input Register The Client in the connection reads word data from
the Server in the connection,
data length ≥ 1 Word, content: diagnostic word
(data received from 3x)
FC 05 Write Single Coil The connection Client writes to one bit datum in the
connection Server,
data length = 1 Bit, content: input data
(send data to 0x)
FC 06 Write Single Regis-
ter
The connection Client writes to one word datum in
the connection Server,
data length = 1 Word, content: input data
(send data to 4x)
FC 15 Write Multiple Coils The connection Client writes to multiple bit data in
the connection Server,
data length ≥ 1 Bit, content: input data
(send data to 0x)
FC 16 Write Multiple Reg-
isters
The connection Client writes to multiple word data in
the connection Server,
data length = 1 Word, content: input data
(send data to 4x)
FC 23 Read/Write Multiple
Registers
The connection Client reads and writes multiple
word data within a telegram
(receive data from 3x and send data to 4x)
Data transfer limits
The following table contains information on the maximum data length per telegram that is
supported:
Data transfer Max. data length per telegram
Read data
(Bit)
FC 01 (Read Coils) 1 … 2000
FC 02 (Read Discrete Inputs)
Read data
(Bit)
FC 05 (Write Single Coil) 1 Bit
FC 15 (Write Multiple Coils) 1 … 1968
Read data
(Word)
FC 03 (Read Holding Regis-
ters)
1 … 125
FC 04 (Read Input Register)
Write data
(Word)
FC 06 (Write Single Register) 1 Word
FC 16 (Write Multiple Regis-
ters)
1 … 123 Words
Read and
write data
(Word)
FC 23 (Read/Write Multiple
Registers)
Read 1 … 125 Words
Write 1 … 121 Words
6.4.3