Rockwell Automation 1746-NR4 SLC RTD/Resistance Input Module User Manual - Manual (Page 91)

Publication 1746-UM008B-EN-P - December 2006
Ladder Programming Examples 91
Dynamic Programming The programming example explains how to change data in the
channel configuration word when the channel is currently enabled.
Programming Procedure
1. Create a new element in integer file N10 using the memory map
function.
Integer file N10 already contains four elements (N10:0 through
N10:3). You add a fifth element (N10:4).
2. Enter the same configuration data as in the previous example
using the data monitor function, except for bit 8.
Bit 8 is now set for a logic 0 (°C).
EXAMPLE
Execute a dynamic configuration change to channel 2 of the
RTD module located in slot 3 of a 1746 chassis. Change from
monitoring the temperature in °F to monitoring in °C.
] [
COP
COPY FILE
Source
#N10:0
Dest #O:3.0
Length 4
S:1
15
Set up all four channels. Rung 2:0
] [
0
Set channel 2 to display in ˚C. Rung 2:1
B3
0
I:1.0
MOVE
Source
N10:4
Dest O:3.2
MOV
[OSR]
Rung 2:2
B3
1
MOVE
Source
N10:2
Dest O:3.2
Set channel 2 back to display in ˚F
MOV
0
I:1.0
[OSR] ]/[
Rung 2:3
END