ABB Advant Controller 450 User Manual

Advant
®
Controller 450 User’s Guide
Section 2.3.2 Controller and I/O
3BSE 002 415R701 Rev A 2-51
Regardless of the shut-down method, the result and consequences are:
• Application program execution immediately stops.
• There is zero output to the process objects.
• Output relays are de-energized.
• The RAM, including system software and application program, is secured against loss of
power by a supply of power from a battery backup.
• Important process values, for example totalized flow values, register content, and so on,
can be stored automatically if measures are taken when the application start program is
designed.
• The system is ready for a restart. You perform a restart by operating the actual mains
switch when the reason for the shut-down is resolved.
The application start program also facilitates a different way to start up the application,
depending on the time of power supply disconnection.
A note about the application of distributed S100 I/O, S400 I/O and S800 I/O:
If such an I/O system is powered from the central system (the mains distributed), then the
instructions and consequences given above in connection to a shut-down are relevant.
If, however, the distributed S100 I/O system, the S400 I/O system and the S800 I/O system are
powered by a separate mains, separate safety switch, and so on, then you must make a
distinction between a “central” and “local” shut-down.
S100 I/O
A central shut-down causes the S100 I/O outputs to go to zero.
A local shut-down causes the S100 I/O outputs to go to zero.
S400 I/O
A central shut-down causes the S400 I/O outputs to freeze or go to zero, as applicable.
A local shut-down causes the S400 I/O outputs to go to zero.
S800 I/O
A central shut-down causes the S800 I/O outputs to freeze or go to a predefined value,
as applicable.
A local shut-down causes the S800 I/O outputs to go to zero.
Regarding the output behavior attached to S100 I/O, S400 I/O and S800 I/O, please be aware
that zero output is the designed state. It cannot be guaranteed under all conditions, for example,
in the event of a failure.
Manual Stop
Besides the most drastic shut-down method—disconnecting the power supply—other methods
of “stopping” the controller are available to you.
You can stop program execution as follows:
• Use the operator’s interface on the processor module front.
– Set the start mode selector in 2 (STOP) position.
– Depress the ENTER button and the system stops.
• Use an engineering station connected to the controller.
– Command ECONFIG in an adequate session.

ABB Advant Controller 450 Specifications

General

Brand	ABB
Model	Advant Controller 450
Category	Controller
Language	English