User`s manual

DSM314 COMM REQ
GFK-1742A Appendix B DSM314 Communications Request Instructions B-13
B
User Data Table COMM REQ Example
C
OMM_
R
EQ
I
N
S
YSID
T
ASK
F
T
ENABLE
%R196
0007
00000
C
PU
D
SM
Power
Supply
1
Slot No:
2
3
4
5
6
7
8 9 10
S
eries 90-30 PLC, Rack 0
(
0007 = Rack 0, Slot 7)
Command Block for DSM COMM_REQ
M
emory
A
ddress
Value
D
escription
%
R196 4
L
e
ngth, in words, of Data Block H
e
ader (always 4)
%
R197 0
W
AIT/NOWAIT Flag. Always 0 for DSM
%
R198 8
8
= Register memory (%R) for Status Word
a
ddress
%
R199 194
S
pecifies register 195 for Status Word address
%
R200 0
A
lways 0 for DSM
%
R201 0
A
lways 0 for DSM
(Start of “Data
B
lock
H
eader” section
)
%
R202 D001h
W
rite to DSM314’s User Data Table Segment 1
%
R203
2048
U
DT Segment Size, always 2048 bytes
%
R204 8
8
= Register memory (%R) for PLC Memory
%
R205 300
S
pecifies register 301 for start of PLC data
%R195: Status
Word Register
(
Always 0 for DSM)
F
ault output
(Command Block pointer)
Data Block
Header
(4 words)
MSWD-TWM
S
F
AULT
%
M0295
S
END
%
T0001
%T0001
Figure B-5. DSM314 UDT COMM REQ Example