CTI Janus Programmable Automation Controller IOG
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The Janus controller is configured to be a member of both IP subnets.
•
Primary Subnet IP Address = 172.18.12.10 with Subnet Mask = 255.255.255.0.
•
Alternate Subnet 1 IP Address = 172.18.13.10 with Subnet Mask =255.255.255.0.
Consequently, the Janus controller is able to communicate directly with devices on either subnet. A CAMP Server
application would be able to communicate with devices on the
“
data
”
network subnet and an Open Modbus Client
would be able to communicate with I/O devices on the “I/O”
network.
NOTE
IP subnets are not directly associated with an Ethernet Port.
As explained earlier, the Ethernet switch is responsible for delivering frames containing the IP Protocol to the correct
device via the corresponding port. It is acceptable (although unusual) for devices on different IP subnets
to exist on the same Ethernet Local Area Network.
Also, IP subnets are not associated with an application. The internal TCP/IP software (TCP/IP stack) routes data to
an application based on the IP port number.
