I/O Port LEDs

The CHARM I/O Carrier and WirelessHART I/O Carrier house a primary and secondary I/O Port (IOP). There are two types of IOPs: a copper IOP and a fiber-optic IOP. The copper IOP consists of a control network port and a cascade port. The fiber-optic IOP consists of a control network port only.


Table: Control network port LEDs on the copper and fiber-optic IOP
LED color and pattern Description and corrective action
Flashing green The link is established and active Ethernet traffic is being transmitted and received. This is the normal operating condition.
Solid green The link is established, but no Ethernet traffic is occurring. This indicates that the IOP is connected to a network switch, but may not be connected to a controller or ProfessionalPlus workstation. This typically occurs during initial installation when network connections are not yet complete.
Off The IOP is not communicating on the network. Verify that the:
  • Network cable is properly connected
  • IOP is properly seated in the carrier
  • CIOC or WIOC is properly installed in the carrier
  • CIOC or WIOC is properly powered
For redundant CIOCs or WIOCs, verify that the ACN LEDs are flashing. If the LED remains Off after ensuring the items in the preceding list, replace the IOP.
Table: Cascade port LED on the copper IOP
LED color and pattern Description and corrective action
Flashing green The link is established and active Ethernet traffic is being transmitted and received. This is the normal operating condition when the cascade port is enabled.
Solid green The link is established, but no Ethernet traffic is occurring. This indicates that the cascade port is enabled and connected to a network switch, but may not be connected to a controller or ProfessionalPlus workstation. This typically occurs during initial installations when network connections are not yet complete.
Off This is the normal operating condition when the cascade port is disabled. When the cascade port is enabled, the LED blinks green indicating the normal operating condition. Use the CIOC or WIOC Property page in DeltaV Explorer to enable the cascade port.