Installation Guide

Overview
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System Scheduled Maintenance
The Conext ComBox is unavailable for approximately three minutes at 3:05 AM
daily. During this time, the Conext ComBox performs routine maintenance and
does not respond to queries via any of its external interfaces, such as
Modbus TCP, RS 485, Web Services, and Web Pages. Data logging is also
suspended during this period.
Machine to Machine Communication
The Conext ComBox signals the start of the routine maintenance period to
external communication devices one minute before the routine starts, by setting
its “MAINTENANCE” Modbus register (at address 0x003D) to 1.
External communication devices should stop queries to the Conext ComBox for
at least four minutes after detecting that the Conext ComBox’s “MAINTENANCE”
Modbus register is currently set to 1.
After the routine maintenance is completed, the “MAINTENANCE” Modbus
register (at address 0x003D) is reset to 0.