SBC PCD1 Series Manual page 70

Saia-Burgess Controls AG
Deleting stored texts/DBs on the flash card,
SYSWR K 9002
Instruction:
Accu status after execution:
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
Manual Manual PCD 1 / PCD 2 Series │ D ocument 26 / 737 EN22 │ 2 013-11-26
SYSWR K 9002
1)
K 0
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
firmware in the 2nd half of 2004
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
flash card
CPUs and expansion housings
; Dummy parameter, required to
; maintain the structure of the SYSWR
; instruction
Backup of the user program
3
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