Rockwell Automation 1747-DTAM-E,D17476.1 Data Table Access Module (DTAM) - Manual (Page 83)

Troubleshooting 9-3
Publication 1747-6.1
Troubleshooting
Module Problems
Using the LCD
TROUBLESHOOTING CONSIDERATIONS
MODULE DISPLAY COMM LED PROBABLE CAUSES RECOMMENDED ACTION
ERROR 100 LED illuminated red
ROM memory failed checksum
test
Reset module.
ERROR 200 LED illuminated red RAM failed Read/Write test Reset module.
ERROR 300 LED illuminated red Keypad malfunction Reset module.
ERROR 400 LED illuminated red
Configuration memory failed
checksum test
1. Cycle module power.
2. Reconfigure module. Refer
to chapter 3, Module Setup
Procedure .
Backlighting off LED illuminated red
Insufficient power supply
voltage
Check power supply.
Backlighting flashes on and off LED illuminated red
Insufficient or unregulated
power supply voltage
Check power supply.
LCD background is solid black Any Enclosure is too hot
1. Adjust display contrast,
turn pot clockwise.
2. Operate within temperature
specifications.
LCD characters are out of line Any
Enclosure is too hot or module
is exposed to sudden
temperature change.
Allow temperature to stabilize.
LCD is difficult to read Any Backlighting was Turned Off
Reconfigure module. Refer to
chapter 3,
Module Setup
Procedure .
LCD characters unintelligible Any
Water contamination in
module
Correct condition.
Improper initialization Reset module.
Module Cconfigured for a
foreign language
Reconfigure module. Refer to
chapter 3,
Module Setup
Procedure .
LCD appears faded or no
display at all
Any Enclosure too cold
Adjust display contrast, turn
pot counter clockwise.
Module subjected to excessive
heat or humidity
Disconnect module. Contact
your local Allen-Bradley
representative.