Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 107)

Remote I/O Communications 8–15
Publication 2706-6.1
When variables are sent, all [CTRL][V] (formatted) variables must be
sent first followed by [CTRL][W] (unformatted) variables.
Note: ^ W means the same as [CTRL][W] .
Example:
If a message has variables positioned as follows:
[CTRL][V] [CTRL][W] [CTRL][V] [CTRL][W] [CTRL][V]
First
Position
Second
Position
Third
Position
Fourth
Position
Fifth
Position
and [CTRL][W] variables are ASCII, they would be sent in the
following order:
^V 1st position
^V 3rd position
^V 5th position
^W 2nd position ^W 4th position
MSB LSB
WORD n
WORD n +1
WORD n +2
WORD n +3
If [CTRL][W] variables are BCD variables, word n+3 would look
like:
UNUSED
MSB LSB
WORD n +3 ^W 4th position ^W 2nd position
Sending Variables