Saia-Burgess Controls AG
Hardware manual for PCD3 series │ Document 26-789 ENG19│ 2018-06-29
Optional memory upgrades
PCD3.Mxxx0 Classic CPU and expansion enclosure
3-65
3
User programm backup on flash card
It is possible to save a backup of the user program (see chapter 3.13.1) to the
flash card in the PCD3.R60x.
The storage locations for the user program (save and recall) are queried in the
following order:
1. M1 slot
2. M2 slot
3. I/O Slot 0…3
4. Onboard flash memory (if available)
I/O bus functions
Some states are recognized by the user program.
I/O Bus
offset
Write
Read
Meaning
+0
User LED
BCD switch position bit 0 (lsb)
Position (non-inverted) of the
BCD switch
+1
do not use
BCD switch position bit 1
+2
do not use
BCD switch position bit 2
+3
do not use
BCD switch position bit 3 (msb)
+4
do not use
/Labeling clip available
1 = removed
+5
do not use
-
+6
do not use
/Flash card available
1 = card removed
+7
do not use
SD write-protect switch
1 = SD locked/removed
0 = MMC or SD released
Ordering information
Ordering
information
Description
Weight
PCD3.R600
Basic module with slot for SD flash memory cards
PCD7.R-SDxxx (up to 4 modules in I/O slots 0…3 on a PCD3)
60 g
PCD7.R-SD256
SD memory flash card 256 MB
2 g
PCD7.R-SD512
SD memory flash card 512 MB
2 g
PCD7.R-SD1024
SD memory flash card 1 GB
2 g