KUC755AE117 ABB Drive unit power supply

Description

KUC755AE117 The 745 performs self-diagnostics at initialization (after power-up), and continuously

thereafter (in a background task). The tests ensure that every testable unit of the hardware

is functioning correctly.

Any self-test error indicates a serious problem requiring service.

Major self-test errors:

Upon detection of a major self-test error, the 745:

• disables all protection functionality
• turns on the front panel KUC755AE117 Self-Test Error LED
• turns off the front panel In Service LED
• de-energizes all output relays, including the self-test relay
• indicates the failure by inserting an appropriate message KUC755AE117 in the target message

queue

• records the failure in the event recorder

Minor self-test errors:

Upon detection of a minor self-test error, the 745:

• turns on the front panel Self-Test Error LED
• de-energizes the Self-Test Relay
• indicates the failure by KUC755AE117 inserting an appropriate message in the target message

queue

• records the failure in the event recorder

All conditions listed in the following table cause a target message to be generated

Flash messages are warning, error, or general information messages displayed in response

to certain key presses. The length of time these messages remain displayed can be

programmed in S1 745 SETUP  PREFERENCES  FLASH MESSAGE TIME. The factory

default flash message time is 4 seconds.

Self-Test Warning 10

Self-Test Warning 10

Call Service

Minor This warning is caused by 745

microprocessor self-monitoring its

own tasks.

Self-Test Warning 11

Self-Test Warning 11

Call Service

Minor This warning is caused at power-on

by fault in microprocessor reset

status.

Table 6–4: Self-test error interpretation (Continued)

Event message

Target message Severity

Cause

ADJUSTED VALUE

HAS BEEN STORED

This flash message is displayed in response to pressing

ENTER while on a setpoint message with a numerical

value. The edited value had to be adjusted to the

nearest multiple of the step KUC755AE117 value before it was stored.

COMMAND IS BEING

EXECUTED

This flash message is displayed in response to

executing a command at a command message.

Entering “Yes” at a command message will display the

message ARE YOU SURE?. Entering “Yes” again will

perform the requested command, and display this

flash message.

DEFAULT MESSAGE

HAS BEEN ADDED

This flash message is displayed in response to pressing

the decimal key, followed by ENTER twice, on any

setpoint or actual value message except those in the

default messages subgroup.

DEFAULT MESSAGE

HAS BEEN REMOVED

KUC755AE117 This flash message is displayed in response to pressing

the decimal key, followed by ENTER twice, on one of

the selected default messages in the default messages

subgroup.

ENTERED PASSCODE

IS INVALID

This flash message is displayed in response to an

incorrectly entered passcode when attempting to

enable or disable setpoint access. It is also displayed

when an attempt has been made to upgrade to an

option without the correct passcode.

ENTRY MISMATCH –

CODE NOT STORED

This flash message is displayed while changing the

programmed passcode from the change passcode

command. If the passcode entered at the prompt

PLEASE RE-ENTER NEW PASSCODE is different from the

one entered at the prompt PLEASE ENTER A NEW

PASSCODE, the 745 will not store the entered

passcode, and display this flash message.

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