ABB controller DSQC332 full series mechanical protection device

Description

DSQC332 A passcode of “0” effectively turns off the passcode feature – in this case only the

access jumper is required for changing setpoints. If no key is pressed for 5 minutes, access

to setpoint values will be restricted until the passcode is entered again. DSQC332  To prevent setpoint

access before the 5 minutes expires, the unit may be turned off and back on, the access

jumper may be removed, or the SETPOINT ACCESS setpoint may be changed to

“Restricted”. The passcode cannot be entered until terminals D9 and D10 (access

terminals) are shorted. When setpoint access is allowed, DSQC332  the Setpoint Access LED indicator

on the front of the 745 will be lit.

Setpoint changes take effect immediately, even when transformer is running. However,

changing setpoints while the transformer is running is not recommended as any mistake

may cause a nuisance trip.

The following procedure may be used to access and alter setpoints. This specific example

refers to entering a valid passcode to allow access to setpoints if the passcode was “745”.

1. Press the MENU key to access the header of each menu, which will be displayed in the

following sequence:

2. Press the MENU key until the display DSQC332  shows the header of the setpoints menu, then

press the MESSAGE RIGHT or ENTER key to display the header for the first setpoints

page. The set point pages are numbered, have an ‘S’ prefix for easy identification and

have a name which gives a general idea of the settings available in that page.

Pressing the MESSAGE keys will scroll through all the available setpoint page headers.

Setpoint page headers look as follows:

3. To enter a given setpoints page, DSQC332  press the MESSAGE RIGHT or ENTER key. Press the

MESSAGE keys to scroll through sub-page headers until the required message is

reached. The end of a page is indicated by the message END OF PAGE. The beginning

of a page is indicated by the message TOP OF PAGE.

4. Each page is broken further into subgroups. Press MESSAGE UP or DOWN to cycle

through subgroups until the desired subgroup appears on the screen. Press the

MESSAGE RIGHT or ENTER key to enter a subgroup.

5. Each sub-group has one or more associated setpoint messages. Press the MESSAGE

UP or DOWN keys to scroll through setpoint messages until the desired message

appears.

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