User`s manual

DSM314 COMM REQ
GFK-1742A Appendix B DSM314 Communications Request Instructions B-17
B
DSM Parameter Load COMM REQ Example
This example is used as the basis for the following section, “Section 5: COMM REQ Ladder Logic
Example.” In this example, the following specifications are given:
•
The DSM module is mounted in Rack 0, Slot 7 of the PLC.
•
The Command Block’s starting address is %R0196.
•
The Status Word is located at %R0195.
•
16 parameters are to be sent.
•
The COMM REQ’s FT (fault) output drives a Set Coil.
•
DSM Parameter 1 is considered critical in this example application. The last two rungs of the
“COMM REQ Ladder Logic Example” (see Section 5) verify that Parameter 1 received the
correct value via the COMM REQ.
•
The data in 32 words (16 double words) of PLC memory, %R0208 through %R0239, are
copied to 16 double word parameter registers, P001 through P016, in DSM314 parameter
memory. This transfer of data is illustrated in the next figure:
PLC CPU
R
egister Memory
DSM314 Parameter
Memory
%R0000
%R0208
%R0239
P
001
P
016
32 Words
(16 Double
words)
(16 Double
Words)
P
255
Figure B-6. Data Transfer for Parameter Load COMM REQ Example
D
ATA