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Saia-Burgess Controls AG

Manual Manual PCD 1 / PCD 2 Series │ Document 26 / 737 EN22 │ 2013-11-26

CPUs and expansion housings

3-53

Backup of the user program

Deletingstoredtexts/DBsontheashcard,

SYSWRK9002

Instruction:

SYSWR K 9002

K 0 ; Dummy parameter, required to

;maintainthestructureoftheSYSWR

; instruction

1) Alternatively,thevalue9002canbepassedinaregister.OnthePCD3,theinstruction

SYSWRK3002isusedforthesamefunction.Forreasonsofcompatibility,SYSWRK

3002 can also be used on the PCD1/2, but this alternative was only integrated into the

rmwareinthe2ndhalfof2004

Accu status after execution:

low: The text strings/DBs have been deleted and the process

iscomplete,sofurtherSYSWRK900xinstructionscan

be executed immediately

high: The last instruction has not yet processed to completion;

beforefurtherSYSWRK900xinstructions,aSYSRD

K9000mustbeexecutedtocheckthereadinessofthe

ashcard

 WhenusingtheinstructionSYSWRK9002,notethefollowing:

● Thedeletiononlyaffectstext/DBspreviouslystoredwithSYSWRK9000.The

contents of the extension memory stored after a download are retained

● ASYSRDK9000mustbeexecutedbeforethisinstruction,totestwhetherthe

flash card is available and ready

● Theprocessingtimefortheinstructionmaybeseveral100ms.Forthisreason,

the instruction must not be invoked in XOB 0 (XOB for a power outage) or during

time-critical processes

● Iferrorsoccurduringprocessing,e.g.becausenoflashcardispluggedin,XOB13

willbeinvoked(wherepresent),ortheErrorLEDwillbeset

SBC PCD1 Series User Manual

Questions and Answers: