Programming and operation chapter 3 – Rockwell Automation 1771-IS 5V DC INPUT MOD User Manual
Page 22
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Programming and Operation
Chapter 3
3-3
Figure 3.2
4-digit Thumbwheel Switch Data Storage, Maintained Contacct mode ( SWITCH #4 OFF)
MSD UMD
LMD LSD
MSD UMD
LMD LSD
MSD UMD
LMD LSD
Extra
Byte
2 8
3 4
4 2
5 1
8 6
4 7
2 8
1 9
Switch
Terminals
Field Wiring Arm
Terminals
a) Block Diagram
Switch
Terminals
Field Wiring Arm
Terminals
A
B
C
D
E
F
G
H
I
Switch 1
User Thumbwheel
Switch 2
Switch 3
Switch 4
1/2 Switch 5
10370
Data
Table
Word
XX0
1
2
3
4
5
Diagnostics
-
-
-
MSD
UMD
LMD
LSD
1
MSD
UMD
LMD
LSD
3
MSD
UMD
LMD
LSD
4
9
7
5
3
2
-
-
Extra Byte
5
17
Switch Status Data
10 07
00
Switch
Number
b) Data Table Map
9
7
3
5
9
7
5
3
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