Among the configuration options for CIOCs are redundancy, system hardware alarms, enabling or disabling the primary and secondary cascade ports on the CHARM I/O carrier, and scan rate.
Redundant CIOC functions and CIOC hardware alarms are the same as redundant controller functions and controller hardware alarms.
Enabling a cascade port, which is a copper Ethernet port on the CIOC carrier, enables multiple CIOCs to be connected together in series without wiring back to a central switch. A maximum of 16 CIOCs can be cascaded together on the DeltaV Control Network. Connect only CIOCs to the cascade port. Do not connect any other network devices to the cascade port. There are primary and secondary cascade ports. For security purposes, the cascade ports can be enabled or disabled individually.
The recommended way to download after making scan rate changes is from the CIOC. This sends the change to all relevant nodes and does not affect non-relevant nodes.
Fiber-optic ports rather than copper ports can be used to connect remotely located CIOCs to a DeltaV Control Network. CIOCs with a fiber-optic port cannot be daisy-chained and are used in star-connected topologies.