Rockwell Automation 1746-FIO4V SLC 500 Fast Analog I/O/ User Manual - Manual (Page 71)

Publication 1746-UM009B-EN-P - September 2007
Test Module Operation 71
3. With the programming device on-line, select the processor’s
Test- Continuous scan mode.
This provides a safer testing mode because outputs are not
energized.
4. Display the data in File 2 (Input Image table).
5. Select the Data Monitor mode of your programming device
when viewing I/O point I:1.0.
6. Change the radix of the display to decimal.
7. If the sensor is connected, set it to its lower limit.
If the sensor was disconnected from the module’s input channel,
attach the replacement voltage or current source and set the
source to the lower limit.
8. Locate the channel’s signal in the input image table.
The signal should be approximately equal to the lower limit
computed in step B.
The value of the input image word is affected by the accuracy of
the module and sensor.
Any error should be within the sum of their tolerances.
9. If the sensor is connected, set it to the upper limit.
If the sensor was disconnected from the module’s input channel,
set the replacement voltage or current source to the upper limit.
10. Repeat step 7, this time for the upper limit.
11. Repeat steps 1…10 for the other analog input channel.
If either of the analog input channels does not pass this start-up
procedure, check for the following potential causes.
• The analog sensor (voltage or current source) is not operating
properly.
• The processor is not in the Test/Continuous scan mode.
• The terminal block is not secured on the module.
• The terminal block is not wired properly or wires are broken.