The RIO module and the Guidance Controller communicate over a standard 10/100 Mb Ethernet network. Input and output signal states are communicated in messages that are periodically sent between the two devices. To facilitate setting up the Ethernet communications link, the RIO includes a built-in web server that provides access to the RIO's software configuration information.
Like most Ethernet devices, the RIO must have an Ethernet IP address/subnet mask assigned before it can be used. Initially, the RIO IP address/subnet is set to "192.168.0.101" and "255.255.255.0". If that information is acceptable on the network, no further network configuration is required. Otherwise, change the IP information by modifying the parameters. See Table 32-1.
For security purposes, restrict access to the RIO module to certain Controllers or MODBUS masters. Only IP addresses found in the "MODBUS master IP address" (DataID 560) array are allowed to connect with the RIO module. The default value of "255.255.255.255" means that security is disabled and any address can connect.
To access these values via the web interface of the RIO, go to Setup > Parameter Database > Controller >.
After these values are updated and saved to the flash disk, restart the RIO module to put the changes into effect.
| Parameter Database ID | Parameter Name | Default Value | Description |
|---|---|---|---|
|
420 |
Local IP address |
192.168.0.101 |
IP address of the RIO module |
|
421 |
IP subnet mask |
255.255.255.0 |
IP address mask for the RIO module |
|
422 |
IP gateway address |
192.168.0.100 |
IP address of any network gateway |
|
560 |
MODBUS master IP address |
255.255.255.255 |
Array of IP addresses specifying the Controller or MODBUS master that can connect to this module |