Honeywell CIU 888 - Downlink CIU

CIU Emulation
Protocol Manual - CIU Emulation Part No.: 4417589_Rev13
1 - 6 CIU 888
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Cache mode for a host port can be configured via the CIU 888 WEB-
interface (see FIGURE 1-6).
NOTE: In case of 880 Migrations, Cache mode is configured in CIU web interface. For
the new sites, it will be configured by Service Tool.
FIGURE 1-5 CIU 888 WEB-interface: Configuration of cache mode for a host port
1.2 Downlink CIU
A field port can be used to connect an existing CIU with tank gauges.
This CIU is called a downlink CIU. The CIU 888 can communicate with
a downlink CIU using the GPU protocol on serial (RS-232/RS-485),
creating an extra layer between the CIU 888 and the tank gauges
connected to the downlink CIU. The following CIUs can act as a
downlink CIU:
 CIU 858
 SmartLink