American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 129)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-124 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

5. The SCADA subsystem shall provide monitoring of the seismic detectors

and gas sensors and generate commands for emergency operation

procedures for the control of ventilation fans and dampers. Communication

shall be provided via RTUs on the CTS for data exchange between the ROC

and the CRTs located in the passenger station TC&C rooms, yard, shop and

maintenance areas.

9.11.3. Design Criteria

1. Equipment and associated peripherals for the SCADA subsystem shall

include, but not be limited to, the following:

a. Redundant server processors

b. Data storage peripherals: Disc drives and archive media drives

c. Hard copy printers: High-speed gray scale and color printers

d. Control consoles consisting of:

 Dual head, flat screen monitors

 Keyboard

 Computer interface

 Cursor positioning devices.

2. Remote and ROC RTUs shall operate in a full duplex mode with each

continuously scanning and reporting the changes of status of indications and

commands. The RTUs shall utilize reliable, error detecting communications

protocols. Capability shall be provided to scan each data point at an

assignable rate, selectable between one second and 30 seconds per scan

cycle.

3. A computer platform consisting of redundant server processors shall perform

the real-time data acquisition processing, generation of supervisory control

commands, alarm generation, database management, execution of

diagnostic and maintenance programs.

4. Offline simulation and playback functions shall be provided.

5. Hard copy peripherals (e.g. printer) shall interface with the ROC computer.

In addition to the generation of reports, these hard copy peripherals shall be

capable of printing out all alarms that are stored in redundant databases,

including the date and time at which they occur.

6. Alarm displays shall be designed with latching circuitry. An annunciator shall

sound an initial alarm and the visual indication shall be illuminated. The

audible alarm shall have a silencer function. The visual indications shall

remain latched until the alarm is cleared and the indication is reset. Both

audible and visual reset provisions shall be provided on a graphical display

on the SCADA console.

7. Multi color displays with direct manual access to the cursor shall be used for

English language alphanumeric display of status indications, alarms and

controls and graphic display of the schematic diagrams and plans.

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