American Audio VELOCITY - REV 4-05 Instrukcje Operacyjne Pobierz pdf (Strona 168)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

Appendix A

DE304.09 Appendix 9A-7

Metro Baseline Re-Baseline: 04/20/10

3. Chassis discrete input and analog input I/O shall be block transferred to the

assigned memory maps on each CPU scan cycle.

4. Remote I/O shall be transferred to/from assigned memory maps on data

change.

5. Gateway I/O shall be pushed/pulled by external gateway equipment

provided to/from the assigned memory maps.

6. A block of memory of at least 20 words shall be reserved for special

calculations. This area will store the results of any special calculations that

must be performed on field I/O prior to transmission to/from SCADA.

7. The following diagram illustrates the minimum typical SCADA memory map

allocations:

1 2 ... 163 164 165 166 167 168 169 170 171 172 173 ... 190 191

Brak uwag

American Audio VELOCITY - REV 4-05 Instrukcje Operacyjne Strona 168