Campbell Scientific CR1000KD CR800 and CR850 Measurement and Control Systems - Page 317
Table 71., CR800 SRAM Memory
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Section 8. Operation Table 71. CR800 SRAM Memory Use Comments Static Memory Operational memory used by the operating system regardless of the user program. This sector is rebuilt at power-up, program re-compile, and watchdog events. Operating Settings and Properties "Keep" memory. Stores settings such as PakBus address, station name, beacon intervals, neighbor lists, etc. Also stores dynamic properties such as the routing table, communications timeouts, etc. CRBasic Program Operating Memory Variables & Constants Stores the currently compiled and running user program. This sector is rebuilt on power-up, recompile, and watchdog events. Stores variables in the user program. These values may persist through powerup, recompile, and watchdog events if the PreserveVariables instruction is in the running program. Final-Storage Data Tables Final Storage is given lowest priority in SRAM memory allocation. Communications Memory 1 Communications Memory 2 Stores data resulting from CR800 measurements. This memory is termed "Final Storage." Fills memory remaining after all other demands are satisfied. Configurable as ring or fill-and-stop memory. Compile error occurs if insufficient memory is available for user-allocated data tables. Construction and temporary storage of PakBus® packets. Constructed Routing Table: list of known nodes and routes to nodes. Routers use more space than leaf nodes because routes to neighbors must be remembered. Increasing the PakBusNodes field in the Status table will increase this allocation. USR: drive
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