Rockwell Automation 1746-INT4 Thermocouple/mV Isolated Input Module Quick Start - Manual (Page 15)

Thermocouple/mV Isolated Input Module 15
Publication 1746-QS002B-EN-P - July 2002
Write Ladder Logic to Process Input Data
Write ladder logic to process the thermocouple input data for your application:
Apply Power and Download Your Program
Apply power. Download your program to the SLC and put the controller into RUN
mode. In this example, during a normal startup, the module status LED and channel
status 0 LED illuminate.
TIP
For more detailed information on these procedures, refer to
Chapter 7 (Ladder Programming Examples) and Chapter 9
(Application Programming Examples) of the user manual.
TIP
For more detailed information on these procedures, refer to
Chapter 8 (Module Diagnostics and Troubleshooting) of the
user manual.
Channel 1 Data Word
Channel 2 Data Word
Channel 3 Data Word
Output Image
SLC 500 Controller
Data Files
Bit 15 Bit 0
Word 1
Word 2
Word 3
Address
I:1.0
Input Image
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Channel 0 Data Word Word 0
Word 7
(8 words)
Channel 1 Status Word
Channel 2 Status Word
Channel 3 Status Word
Channel 0 Status Word
(Variable Thermocouple Input Data)
Address
I:1.0
I:1.1
I:1.2
I:1.3
I:1.7
In this example, the module is located in slot 1.
0
1
2
3
INPUT
Channel
LEDs
Module Status
LED MODULE STATUS
THERMOCOUPLE/mV
CHANNEL
STATUS
ISOLATED
If channel LED is blinking:
Module detected: and status word:
open circuit
under range
over range
config error bit 12 = 1
bit 13 = 1
bit 14 = 1
bit 15 = 1