User Manual
Appendix B
GFK-1742F
Jan 2020
DSM314 Communications Request Instructions
409
B-5
COMM REQ Ladder Logic Example
The following ladder logic example is based upon the Parameter Load COMM REQ example
in the previous section. Refer to the table on the previous page for the Command Block
listing.
Setting up the COMM REQ Command Block Values
The next two rungs load the appropriate values into the first seven words of the COMM
REQ’s Command Block.
Figure 187
In the following two rungs, the remainder of the Command Block data is loaded. This data
is listed next:
%R00202
–
Command. For DSM, it’s always =
E501 (hex)
%R00203
–
Parameter data size, in bytes = 68
%R00204
–
Memory type code for %R memory = 8
%R00205
–
Starting register for Parameter Data (offset by one) = 205
%R00206
–
Starting Parameter Number = 1