Delta AH500 Manual page 461

Indicates that the module connected to the slot of the rack does not match that
configured in the software or the current module has been removed from the slot
though it matched that configured in the software previously
Indicates that the slot in the software is empty but actually, it is inserted by other
module on the rack
On the monitor interface, right click the module icon and select "Run" or "Stop" to change the
operational state of the I/O module.
Ch a pt er 11 DeviceNet Re m ote I/O Module AHRTU-DNET
11-35