SBC PCD2.M5 Series - Page 54

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
3-41
3
Deletingstoredtexts/DBsfromtheashcardwith
SYSWRK3002
Deletingstoredtexts/DBsfromtheonboardashwith
SYSWRK3102
Instruction:
SYSWR K 3x02
1)
K 0 ;Dummyparameter,requiredto
;maintainthestructureoftheSYSWR
;instruction
1)Alternatively,thevalue3x02canbepassedinaregister.
Battery status after execution:
low: the text/DB has been deleted and the process is
complete, so further SYSWR K 3x0x instructions can be
executed immediately
high: thelastinstructionwasnotprocessedtocompletion;
before further SYSWR K 3x0x instructions, a SYSRD
K 3x00 must be executed to check the readiness of the
ashcard
When using the instruction SYSWR K 3x02, note the following:
● The deletion only affects text/DBs previously stored with SYSWR K 3x00. The
contents of the extension memory stored after a
download are retained
● It is strongly recommended to execute a SYSRD K 3x00 before this instruction, to
testwhethertheashcardisavailableandready.
● Theprocessingtimefortheinstructionmaybeseveral100ms.Forthisreason,
itmustnotbeinvokedinXOB0(XOBforapowerfailure)orduringtime-critical
processes.
● Iferrorsoccurduringprocessing,e.g.becausenoashcardispluggedin,XOB
13 will be called where it is present, or the error LED will be set