VDU - VISUAL DISPLAY UNIT Railway Signal Control

 VDU - VISUAL DISPLAY UNIT Railway Signal Control

VDU - VISUAL DISPLAY UNIT




VDU WITH CCIP

(VISUAL DISPLAY UNIT WITH CONVENTIONAL CONTROL & INDICATION PANEL)

 In this type, SM has the option to operate the Points and Signals through the conventional “Control PANEL” or through “VDU”.

 VDU is the exact replica of the conventional panel. Hence it can act as an alternative to the control panel operation.

 VDU consists of a display unit, key board and pointing device (mouse).

 When the VDU is ON, the complete yard with all its knobs, buttons, indications, etc. are displayed on the screen.

 It can be used to carry out all the operations as can be done through CCIP in a very simple manner by clicking the mouse.

 Only one mode – either VDU or Conventional PANEL – should be operated at a time.

 SM can choose the mode of operation at any given time as per his requirement.

 Normally, the operations are to be done through the VDU mode.

 In case of any problem or requirement, this can be transferred to conventional Control PANEL mode manually and this transfer is done automatically during failure of VDU.

 Along with PC software, On Screen Key Board utility is provided to enter the Username and Password. This keyboard is similar to physical keyboard.

 Point control operation in VDU

 As the Electronic Interlocking System provided at stations is route setting type, the Points are set to the required position automatically when a command for clearing a Signal is issued.

 In order to set the Points through route setting, the Point knob shall be in the centre position.

 It is also possible to operate the Point individually, if required.

 To operate the Point to the required position (Normal/Reverse), click the concerned Point Knob.

 A dialog box appears.

 Click the required position either Normal or Reverse in the dialog box.

 The knob position will turn to the selected position (Normal/Reverse).

 The Point will be set to the selected position and the indication will appear in the position concerned.

 Signal control operation in VDU

✓ To clear the Signal and set the route (Main/Shunt/Calling On)

 Ensure that all the Point Knobs in the centre position.

 Click the concerned Signal knob.

 A dialog box appears.

 Click the required position (Reverse) in the dialog box.

 The knob position will turn to the selected position (Reverse).

 Click the concerned Route Button.

 A dialog box appears.

 Click the required option (Press) in the dialog box.

 Signal gets cleared. Route indicator if provided will get lit, when the route is initiated for the loop line.

 Route set indication will be lit in the entire route.

✓ To cancel the cleared Signal (Main/Shunt/Calling On)

 Click the concerned Signal knob.

 A dialog box appears.

 Click the required position (Normal) in the dialog box.

 The knob position will turn to the selected position (Normal).

 The concerned Signal will assume ON aspect.

 The concerned route indication for the initiated route disappears in Absolute Block system after a time lapse of 120 seconds for Home Signal.

 In case of Starter Signal and Subsidiary Signal where Approach Track Circuits are provided and if there is no train in the approach route, the initiated route disappears immediately.

 In case of a train in the approach route, the initiated route disappears after a time lapse of 60 seconds.

 If there are no Approach Track Circuits for Starter Signal and Subsidiary Signal the initiated route disappears after a time lapse of 60 seconds.

 The relevant cancellation counter will register the next higher number.

 DUAL VDU

 In this system, an additional VDU is provided as Standby arrangement.

 Both the VDUs will be in the connected mode and will display the station yard arrangement.

 Normally one VDU will be in the active mode.

 Controlling and operation of signalling functions will be possible through active mode VDU.

 During failure of active VDU, control of all the signalling functions, will automatically change over from active VDU to other (standby) VDU.

 Operation from other VDU is possible only after following the prescribed procure for enabling the VDU.

 For enabling the functions from VDU, duty SM shall click on the icon provided in the VDU.

 SM shall enter Username and Password and Click OK button.

 Indications are provided on VDU to indicate the VDU is activated.

 SM can carry out all further operations from the selected VDU.

 Detailed procedures shall be given in the SWR.

Post a Comment

0 Comments