Local Slave - Lantronix I/O 2100 User Manual

Device server
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Local Slave

The IntelliBox itself hosts a local Modbus slave role. This local slave is addressable from
Modbus/TCP at Unit Identifier 255 (0xFF).The local slave provides access to the relay
and digital I/Os as a single data block:
Address
0
1
2
The server treats broadcast (Unit Identifier 0) as a request to forward to the Modbus
serial port, but does not attempt to apply the function locally.
The local slave supports the following Modbus functions:
Number
1
2
3
4
5
6
15
16
23
43/14
Note:
Any attempt to write to an XIO that the user has configured as an input
returns exception 4 (slave device failure).
IntelliBox-I/O 2100 User Guide
Name
I/O
XIO1
User configurable as input or output
XIO2
User configurable as input or output
Relay
Output
Name
Read Coils
Read Discrete Inputs
Read Holding Registers
Read Input Registers
Write Single Coil
Write Single Register
Write Multiple Coils
Write Multiple Registers
Read/Write Multiple Registers
Read Device Identification (Basic)
C: Modbus
174

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