ABB Switzerland DSTX170 57160001-ADK controller module card spare parts

Description

DSTX170 Target messages are displayed when any protection, monitoring or self-test target is

activated. The messages contain information about the type of the active target(s), and are

displayed in a queue that is independent of both DSTX170 the setpoint and actual value message

structures.

When any target is active, the Message LED will turn on, and the first message in the queue

is displayed automatically. The target message queue DSTX170 may be scrolled through by pressing

the MESSAGE DOWN and UP keys.

As long as there is at least one message in the queue, the Message LED will remain lit.

Pressing any key other than MESSAGE DOWN or UP will return the display to the setpoint or

actual value message that was previously displayed. The MESSAGE DOWN and UP keys

may be pressed any time the Message LED is lit to re-display the target message queue.

If the MESSAGE RIGHT key is pressed when no target DSTX170 messages are in the queue, the

following flash message will appear:

The <STATUS> part of the above message will be one of PICKUP, OPERATE or LATCHED:

PICKUP: Indicates that the fault condition that is required to activate the protection

element has been detected by the 745 but has not persisted for a sufficiently long

time to cause the relay to activate its protection DSTX170 function.

OPERATE: Indicates that the protection element has been activated.

LATCHED: Indicates that the protection element is (or was) activated. This display will

remain even if the conditions that caused the element to activate are removed.

The <PHASE> part of the message represents the phase(s) that are associated with the

element (where applicable).

Messages for LATCHED targets remain in the queue until the relay is reset. Messages for

PICKUP and OPERATE targets remain in the queue as long as the condition causing the

target to be active is present. In addition, messages for LATCHED targets will automatically

be deleted if an entire week passes without any changes to the state of the target

messages but the conditions that caused DSTX170 the LATCHED messages to be displayed originally

are no longer present.

The bottom line of the display (i.e., <CAUSE>) will be the name of the element that has been

activated. These are as follows:

The recorded event displayed for logic inputs and virtual inputs will show the programmed

name of the input/output. An active target display may also be generated as a result of a

self-test error. When this occurs, the self-test error target message will be displayed Refer

to Self-test Errors on page 6–25 for a list of self-test error messages.

As well, there is an additional message that may appear as a target message. It looks like

this:

This message will be placed in the target message queue whenever S1 745 SETUP 

INSTALLATION  745 SETPOINTS is set to “Not Programmed”. This serves as a warning that

the relay has not been programmed for the installation and is therefore not in the in

service state.

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