Control generating event – Rockwell Automation 1766-Lxxxx MicroLogix 1400 Programmable Controllers User Manual User Manual
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Rockwell Automation Publication 1766-UM001H-EN-P - May 2014
Appendix F MicroLogix 1400 Distributed Network Protocol (DNP3)
Control Generating Event
The MicroLogix 1400 checks all elements in the Object Data file for changes at
the end of a scan and generates events where needed.
The key method to turn on and off event generating by ladder logic is to assign or
un-assign the Class information bits in the Object Config Files.
The example below shows how to control the event generation condition by
ladder logic and implements Deadband for Analog Input Objects (which is only
necessary for Series A MicroLogix 1400)
In this example, for 16-bit Analog Input point 0(N11:0), if the absolute value of
the difference between the present value of N11:0 and the value that was most
recently queued as an event for that point exceeds the deadband value, then an
event is generated for that point.
Data File List
Name
Number
Type
Scope
Debug
Words
Elements
Last
Output
0
O
Global
No
18
6
O:5
Input
1
I
Global
No
24
8
I:7
Status
2
S
Global
No
0
66
S:65
Binary
3
B
Global
No
1
1
B3:0
Timer
4
T
Global
No
3
1
T4:0
Counter
5
C
Global
No
3
1
C5:0
Control
6
R
Global
No
3
1
R6:0
Integer
7
N
Global
No
1
1
N7:0
Float
8
F
Global
No
2
1
F8:0
16-bit Analog Input Object File
11
N
Global
No
10
10
N11:9
Binary Output Object File
12
B
Global
No
10
10
B12:0
16-bit32-bit Analog Input Config File
21
B
Global
No
10
10
B21:9
A16I OLD
30
N
Global
No
10
10
N30:9
A16I DEADB
31
N
Global
No
10
10
N31:9
A16I Temp
32
N
Global
No
10
10
N32:9