Advant
®
Controller 450 User’s Guide
Chapter 5 Maintenance
5-6 3BSE 002 415R701 Rev A
5.4.2.1 Reading of System Messages
1. You notice that the Advant Controller has stopped the operation. The character display on
the processor module front shows a halt code (not in all situations).
2. Connect an engineering station (for example Advant Station 100 Series Engineering
Station) to the processor module service port.
If the engineering station is already connected to the processor module do the command
TSESS (terminate session).
3. Set the start mode selector on the processor module in position 4 (OFFLINE).
Then depress ENTER.
4. Set up the engineering station.
In the menu, choose:
a. Advant Controller 400
b. Post Mortem Analysis
If the engineering station prompts
! CONNECTED ERROR - CHECK CONNECTION WITH TARGET SYSTEM!
then depress in OFFLINE mode the ENTER button and try again.
5. Check that the printer is connected to the engineering station.
Enter the command HARDCOPY ON.
6. Enter the following commands one at a time and wait for the printout.
a. LSYSHI List system halt information
b. LTSL List task switch log
c. LSYSM ALL List system messages.
There are cases where it is impossible to connect the engineering station to the Advant
Controller, or impossible to use all commands. In such cases, contact ABB.
NOTE
A message is deleted from the message queue in the system as soon as it is
transmitted to the engineering station. It is important to log the information to a
printer.
5.5 Fault Finding and User Repair
In all situations when the controller has stopped you should carefully read and notes all
halt codes and system messages available before you proceed. See Section 5.4.2.1, Reading
of System Messages.
5.5.1 Introduction
Diagnostics are available in different forms for rapid localization of the source of the equipment
malfunction. Hardware error is usually corrected by replacing the faulty unit, which is returned
to ABB for repairs. The least replaceable unit is normally a circuit board or an apparatus like a
power supply unit.