SBC PCD1.Room - System Memory Structure; Memory Management of Pcds with Cosinus Operating System

Hardware Manual PCD1.M2110R1 │ Document 27-619 │ Version ENG 04 │ 2018-08-20
Saia-Burgess Controls AG
System Memory Structure
CPU / Control Process Unit
3-5
3
3.5 System Memory Structure
User program code incl. ROM DB/Text 256Kbytesavedinthelesystem
Memoryexpansionwithbatterybu󰀨er 128 Kbyte SRAM for read/write access to DB and texts
PCDmediawithbatterybu󰀨er Register: 16'384
Flag: 16'384
Timer/counter: 1600
On-boarduserlesystem 8Mbyteforwebles,datalogging,documentsorbackup
PLClesystem SpeciallesystempartitionPLC_SYSforsystemdata.
The user cannot access this partition. This is only for
internal use.
Backup for user memory OnleSystem=>UserBACKUPfolder
3.5.1 MemorymanagementofPCDswithCOSinusoperatingsystem
The automation devices Saia PCD3 Plus, Saia PCD1.M2 and the programmable
panelareequippedwithanon-boardμSDashcard.Whenloadingauser
application with Saia PG5
®
,allnecessarylesarestoredintheinternalashon
theμSDcard.Iftheoperatingvoltageisappliedtotheautomationdeviceand
there is no executable program in the working memory, COSinus attempts to load
avalidprogramonstart-upoftheμSDcard.
Memory structure and resources of the Saia PCD® systems
Workingmemory
User program 256 kByte
DB/Text 128 kByte
μSD-Flashmemory
File system 8MByte(maximum900lesor225directories)
Flash memory extensions
Extension modules 1
Working
memory
μSD-Flash
Permanent
ashmemory
extensions
Extension device
(max 1)
256 kByte 256 kByte
8 MB
Dateisystem
Memory structure of a PCD1.M2_ with additional memory cards