SBC PCD2.M5 Series - Program Backup And Restore On Backup Flash

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Memory space on the PCD
PCD2.M5_ Classic CPUs and expansion housings
3-35
3
3.12.2 Programbackupandrestoreonbackupash
Theuserprogrammemory(userprogram,text/DBmemoryandextensionmemory),
including the hardware settings, can be copied from a PCD either to the onboard
ashortoanappropriatememorymodule.Theprocedureforbackup/restoreto/from
aashcardisidenticaltothatforbackup/restoreusingtheonboardash.
IfaashcardispluggedintothePCDandabackupisrun,thismoduleis
automaticallywrittentoandthebackupisalsocreatedontheonboardash(provided
sufcientmemoryspaceisavailable).
Witharestorewithamemorymodulepluggedin,thecontentoftheashmoduleis
restoredandthen(wherepossible)copiedtotheonboardash.
Wheremultipleashmodulessuitableforbackinguptheuserprogrammemoryare
installedonthePCD,therstfromtheleftwillberead/writtento(sequence:M1,
M2).
Inordertocopytothebackupash,thecontrolmustbeinaSTOPstate.Where
necessary, a reminder message will appear. The copying process may take up to
30seconds.Duringthe"CopyProgramtoFlash..."operation,theRun/HaltLEDon
thePCDashesalternatelyredandgreen,andtheRunandHaltLEDsalsoash
alternately.
Program backup to backup ash
TheuserprogrammemorycanbeloadedintoashusingPG5.Therelevantfunction
can be found on the "Online" menu within the PG5 project manager or the online
congurator.
Program restore from backup ash
● Automatic restore
If no valid user program is loaded when the CPU is switched on, the CPU
 operatingsystemcheckswhetherthereisavalidprogramintheonboardash;
if so, it is automatically loaded and executed.
Anautomaticrestoreisalsoexecutedifaatbattery,ornoneatall,
is detected on a PCD2.M5xx0.