ABB Advant Controller 450 User Manual

Advant
®
Controller 450 User’s Guide
Section 5.5.9 List of General Fault Finding Procedures and Hints
3BSE 002 415R701 Rev A 5-51
• If all the boards with fault indications are in the same subrack, the fault is probably in the
bus extension to S100 I/O
– Check connections and cables.
– Check and replace the bus extender DSBC 174 located in the I/O subrack. Or replace
modems in an, if available, optical bus extension.
CAUTION
DSBC 174 or DSBC 176 can not be replaced while power supply is switched
on when used in single S100 I/O Bus Extension configuration.
NOTE ALSO!
If the supply to a subrack is switched on before the DSBC 174 or
DSBC 176 is in place, the process outputs in the subrack can set
themselves in optional states!
• If the fault indicating LEDs on several I/O boards illuminate, follow instructions in
Section 5.5.9.9, Fault Finding by Reducing the System.
• Check the process signal status.
The status of the digital signals (DSDI, DSDO) is indicated for each signal connection to
the process by a yellow LED. The values of analog signals can be measured at test points
on the front panel. Detailed information can be found in the manual S100 I/O Hardware.
• Check the power supply units for the actual I/O subrack. Check for blown fuses and other
reasons for voltage disconnection.
• Check fuses for process signals. Most connection units contain fuses. The coupling is
shown in the circuit diagram for the equipment delivered.
• Check signal levels on the connection unit screwed terminal. Use a digital voltmeter and
connect to the measurement terminal on the terminal blocks.
• Check the signal values in the data base in accordance with the instructions in the
reference manual AMPL Configuration Advant Controller 400 Series.
• Check the signal values in the PC diagram in accordance with the instructions in the
manual AMPL Configuration Advant Controller 400 Series.
5.5.9.9 Fault Finding by Reducing the System
Another fast and commonly used method of fault finding, in more complex situations, when halt
code and system messages pointing out the faulty module are missing, is to reduce the system to
a minimum by withdrawing all boards except certain main boards and then returning them to
their places one by one until the fault recurs.
CAUTION
The I/O S100 bus extension board DBC174 or DSBC 176 can not be treated
that way while power supply is switched on when used in single S100 I/O Bus
Extension configuration.

ABB Advant Controller 450 Specifications

General

Brand	ABB
Model	Advant Controller 450
Category	Controller
Language	English