Omron CJ - REFERENCE MANUAL 07-2009 Reference Manual page 34

Command/Response Formats
Command frame
131 characters max.
12
The following diagram shows the response format when there are more than
131 characters.
PLC
Response frame 1
Note 1. Frames in partitioned commands or responses must have not more than
128 characters including the delimiter/terminator.
2. Delimiters from the host computer are detected by the presence of a CR
code. The delimiter will be detected even if there is data in front of it.
Response frame 2 Response frame 3
128 characters max. 128 characters max.
Section 2-2