Why are two words assigned per channel when IO mapping a Compact AS-BADU-257 ?

Title

Why are two words assigned per channel when IO mapping a Compact AS-BADU-257 ?

Issue

Product Line

Modicon Compact

Environment

Cause

Resolution

The ADU257 will allow you to configure a channel's data value as floating point therefore requiring the two words per channel (low word/high word).  If a channel is not configured for floating point, then only the low word data register is utilized per channel.