Rockwell Automation 1764-xxxx MICROLOGIX 1500 PROGRAMMABLE CONTROLLERS - Manual (Page 101)

Publication 1764-UM001B-EN-P - April 2002
Using Trim Pots and the Data Access Tool (DAT) 5-9
Pressing ESC while the fault is being displayed returns the DAT to its
previous mode. The fault is not removed from the controller, just from
the DAT display screen. The fault that was on screen will not display
again and cannot be “recalled”. If a new fault is detected, it will be
displayed. If the initial fault is cleared and returns at a later time, the
DAT will display the fault at that time.
Error Conditions
When the DAT detects an error in its own operation, it displays the
error screen. The error screen consists of “Err” and a two-digit error
code, as shown below.
The DAT can experience two different types of errors, internal errors
and communication errors.
Internal DAT Errors
Internal DAT errors are non-recoverable. When the DAT experiences
an internal error, it displays the error screen, and does not respond to
any key presses. Remove and re-install the DAT. If this does not clear
the error, the DAT must be replaced.
Communication Errors
The DAT continually monitors the interface between the DAT and the
controller to ensure a good communication path. If the DAT loses
communication with the controller for more than three seconds, it
generates an interface time-out error. The DAT automatically attempts
to re-establish communications. The error screen displays until the
DAT regains communications with the processor. All key presses are
ignored until the display clears.
F1
BIT
F2
INT
ESC
ENTER
PROTECTED