Honeywell CIU 888 Configuration Manual page 197

Part No.: 4417584_Rev12
Appendix B - Scanning
The following table provides various priority levels incorporated in CIU
888.
Priority
Very High Product level when it is close to Tank high limit (beyond the
configured Tank high monitoring limit) and product movement is
detected.
High Service messages received over Service Ethernet port
Command scan messages.
Above Normal Product level when detected to be moving in a specific
direction.
Product level when it is close to Tank high limit and no product
movement is detected
Product level when it is close to Tank high limit, and device
communication errors occur irrespective of product movement
being detected / not.
Normal Foreground parameters (for example, Level) of static tanks i.e.
no product movement is detected.
Product level of tanks where it was moving when device
communication errors occur, Service / emulation messages
received over serial host ports.
Below Normal Background parameters (for example, Temperature, Density)
Foreground parameters (for example, Level) of static tanks
when device communication errors occur.
Low Background parameters of tanks when device communication
errors occur.
Configuration Manual
CIU 888
Scenario
B - 11