Rockwell Automation 1746-INT4 Thermocouple/MV Isolated/ User Manual User Manual

Page 58

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Publication 1746-UM614B-EN-P - September 2007

58 Ladder Programming Examples

During the I/O scan, the SLC processor scans configuration words
from its output image file to the module, and scans data and status
words from the module to its input image file. The SLC processor
scans its I/O following each program scan.

We repeat the configuration word because it is used often in the
examples.

Configuration Word

Load Channel
Configurations for Transfer
to the Module

This example shows you how to set configuration bits and transfer
configuration data of all four channels to the module with a single File
Copy instruction.

1. In RSLogix 500 software, open the data file N10 to configure the

module parameters.

12

13

14

15

9

10

8

6

1

2

3

0

0

1

0

0

0

0

1

0

0

0

1

1

0

0

0

7

4

5

0

11

Example Configuration Word with These Parameters:
channel enabled, °C, zero for open-circuit, EU x10, Type K thermocouple

Not Used

Channel
Enable
0 = Disable
1 = Enable

Not Used

Temp
Units
0 = °C
1 = °F

Response to
Open-circuit
0 0 = zero
0 1 = FS
1 0 = LS

Data
Format
0 0 = EU x1
0 1 = EU x10
1 0 = Scaled PID
1 1 = Prop Counts

Type
of Input
0 0 0 0 = Type J
0 0 0 1 = Type K
0 0 1 0 = Type T
0 0 1 1 = Type E
0 1 0 0 = Type R
0 1 0 1 = Type S

0 1 1 0 = Type B
0 1 1 1 = Type N
1 0 0 0 = ±50 mV
1 0 0 1 = ±100 mV
1 0 1 0 = Type C
1 0 1 1 = Type D

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