ICDM-RX/MOD User Manual
Overview
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1.5. Multiple Gateway Modbus Networks
A multiple gateway Modbus Network is created by combining two or more Modbus slave(s) and master(s) with
two or more ICDM-RX/MODs running the Modbus Router and/or Modbus/TCP firmware applications.
•
Typically, at least one chassis will be running the Modbus Router firmware application.
•
The Modbus/TCP application can provide connectivity to local or remote serial and Ethernet TCP/IP Raw/
ASCII devices such as barcode scanners, RFID readers, printers, vision systems, and weigh scales.
•
All Modbus masters connected to a ICDM-RX/MOD running Modbus Router can communicate to all public
slaves.
The following connectivity can be provided in a Modbus network when using multiple ICDM-RX/MOD chassis
with Modbus Router and Modbus/TCP firmware applications:
Modbus Network Connectivity
Grid
Masters
Modbus
/TCP
Master
Modbus/
RTU
Serial
Master
Modbus/
ASCII
Serial
Master
Modbus/RTU
Master over
Ethernet TCP/
IP
Modbus/ASCII
Master over
Ethernet TCP/
IP
Slave
Devices
Modbus/TCP Slave
(remote gateway or
slave Modbus/TCP
device)
X
X
X
X
X
Local Public Modbus/
RTU Serial Slave
X
X
X
X
X
Local Public Modbus/
ASCII Serial Slave
X
X
X
X
X
Remote Modbus/RTU
Serial Slave (via remote
gateway)
X
X
X
X
X
Remote Modbus/ASCII
Serial Slave (via remote
gateway)
X
X
X
X
X
Serial Raw/ASCII
Devices (remote or
local)
X
X
X
X
X
Ethernet TCP/IP Raw/
ASCII Devices (remote
or local)
X
X
X
X
X
Local Private Modbus/
RTU Serial Slave
X
Local Private Modbus/
ASCII Serial Slave
X
