ProSoft Technology 5201-MNET-ASCII - Manual (Page 29)

MNET ♦ ProLinx Gateway Modbus TCP/IP Protocol Configuration
Modbus TCP/IP Interface Module Driver Manual
ProSoft Technology, Inc. Page 29 of 78
September 1, 2010
2.5.10 Slave Address
0 - Broadcast to all nodes
1 to 255
Use this parameter to specify the slave address of a remote Modbus Serial
device through a Modbus Ethernet to Serial converter.
Note: Use the Node IP Address parameter (page 28) to address commands to a remote Modbus
TCP/IP device.
Note: Most Modbus devices accept an address in the range of only 1 to 247, so check with slave
device manufacturer to see if a particular slave can use addresses 248 to 255.
If the value is set to zero, the command will be a broadcast message on the network. The Modbus
protocol permits broadcast commands for write operations. Do not use node address 0 for read
operations.
2.5.11 Modbus Function
1, 2, 3, 4, 5, 6, 15, or 16
This parameter specifies the Modbus Function Code to be executed by the
command. These function codes are defined in the Modbus protocol. The
following table lists the purpose of each function supported by the module. More
information on the protocol is available from www.modbus.org.
Modbus Function Code Description
1 Read Coil Status
2 Read Input Status
3 Read Holding Registers
4 Read Input Registers
5 Force (Write) Single Coil
6 Preset (Write) Single Register
15 Force Multiple Coils
16 Preset Multiple Registers