In the absence of an application, the 140CRP31200 remote I/O head module uses the that is based on the MAC address printed on the front of the module. You can configure the IP address in Control Expert as detailed in the
Quantum EIO Remote I/O Modules Installation and Configuration Guide when you have downloaded an application.
In the absence of an application, the CRA3120 remote I/O adapter module unsuccessfully requests an IP address from the 140CRP31200 head module. The adapter module then requests an IP address from the MAC address printed on the front of the module. The module continues in this cycle because it does not have a valid configuration. This
Not Configured state is indicated by the LED display on the front of the module. There are no exchanges with the PLC. Physical outputs of I/O modules in the are in the fallback state (output forced at 0).