Pilz PNOZ mmc1p ETH - Manual (Page 12)

3.2 Function codes
3 Modbus/TCP - Data areas
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3-2
3.2 Function codes 3200 Function codes 3- ModbusTCP_Function Codes-PNOZmulti
The following function codes (FC) are available for communication with
the modular safety system PNOZmulti via Modbus/TCP:
Function code Function
FC 01 Read Coils The Client in a connection reads bit data from the Server in the con-
nection,
data length
≥ 1 Bit, content: input/output data
(data received from 0x)
FC 02 Read Discrete Input The Client in a connection reads bit data from the Server in the con-
nection,
data length
≥ 1 Bit, content: input/output data
(data received from 1x)
FC 03 Read Holding Register The Client in a connection reads word data from the Server in the
connection,
data length
≥ 1 Word, content: diagnostic word
(data received from 4x)
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 Client in the connection writes to one bit datum in the Server in
the connection,
data length = 1 Bit, content: input data
(send data to 0x)
FC 06 Write Single Register The Client in the connection writes to one word datum in the Server
in the connection,
data length = 1 Word, content: input data
(send data to 4x)
FC 15 Write Multiple Coils The Client in the connection writes to multiple bit data in the Server
in the connection,
data length
≥ 1 Bit, content: input data
(send data to 0x)
FC 16 Write Multiple Registers The Client in a connection writes to multiple word data in the Server
in the connection,
data length = 1 Word, content: input data
(send data to 4x)
FC 23 Read/Write Multiple Reg-
isters The Client in a connection reads and writes multiple word data within
a telegram
(receive data from 3x and send data to 4x)