Clarification on the Manual Follows:

A comment in the YRC1000 EtherNet/IP manual for YRC1000 (178651-1CD) is not clear.   This article is to add add some extra detail to the page below.

In manual below is 178651-1CD, the EtherNet/IP Manual for YRC1000.  The topic in discussion is related to Explicit Message Communication and in particular reading and writing to I/O bytes by this functionality.  On page 5-10 of the manual, there is a confusing note.  The text "Writable" applies to the range above the text.

In particular, the area in yellow below is the only writable input address when using this function:

This information likely applies to YRC1000micro and DX200 manual. 

Guide Available

There is guide available which describes how to setup several Explicit Message examples with a Rockwell PLC.  Contact Yaskawa technical support if you need access to this information.