Driver Display Unit (DDU )
TCMS DDU provides information for the TCMS system to support motor man in operating rake while normal operation, as well as in case of malfunction of a
sub system



DDU supports the maintenance staff in setting basic system parameters and fault finding.
In case of failure of TCMS DDU, train can still be operated in RDM

DDU communicates with TCMS and performs the following basic functions:
-Provide an interface to control train functions
-Display operational status of train functions
-Display diagnostic events

There are two user groups:
-Driver ID and
-Maintenance ID

These IDs and corresponding user names can be configured (add or remove)
through Medha configuration software.

Screen layout consists of 7 sections which are described below:
Section 1 - Head line area: Head Line area gives the information about train number configured, screen heading, date and time fields
Section 2 – Soft key buttons area: The soft key button area contains 10 touch sensitive buttons for different menu entries
Section 3 – Main Screen area: The main screen area shows the actual content of the selected screen. If required, further touch sensitive buttons are shown in the main screen area.
Section 4 - High Priority Message field: Active diagnostic events which require acknowledgement by motor man are present in high priority message field area. For each event, the source of the event (basic unit number) and its event text are displayed along
with an acknowledge button. If no such event is present, the text field and acknowledge button are not displayed. The events are presented in the order of their time of occurrence, across all event sources. When the acknowledge button is pressed, the respective event is acknowledged and disappears from this area.
Clicking on the event is available at events list.
Section 5 - Scrolling Events area: All pending active events are presented in scrolling events area in a scrolling pattern. For each event, the source of the event (basic unit, module details) and its event texts are displayed. If no such event is present, the text field is not displayed. Motor man can manually scroll up and down the list with the provided scroll buttons
Section 6 - Pop up Messages area: Pop up messages area is used to show informative (Popup) messages to motor man depending on the operational status of the train. If no popup message is pending, the area shall be blank
Section 7 - Vmax area: Vmax area indicates the maximum available/ allowed speed of the train. If traction interlock condition is detected by CCC, then ‘Zero Force' appears in this area.

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