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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
3-62
3
Since 10% of the SD card capacity is reserved for the FAT, this extraction PC tool
can be copied there. In this way, data stored in the SBC file system can be quickly
executed on any PC that is equipped with a standard SD card reader. The SBC
PC tool also executes any copies of SBCNTFS.FFS on any drive. The remaining
FAT memory can be used to store documentation or for other purposes.
The PCD3.R600 can be used as PCD3 program backup in the same way as
the PCD7.R500. The PCD3 program backup is stored in the file backup.sei in a
defined area and marked as a hidden read-only file in the FAT.
With the SD card inserted in the PCD3, files can not be accessed in the FAT
area, except for the files SBCNTFS.FFS and backup.sei. During formatting, a
file containing SD card properties is created in the FAT area. File access in a
commercial SD card reader/writer is faster than in a PCD3.
LED
The storage module is equipped with 5 LEDs:
LED
Meaning
User
User LED is switched on by the user program with the base
address of the module (SET = off; RES = on)
Diag
The diagnostic LED turns on when the SD card is not recognizable
(for example, SD card not formatted with FT16, bad boot sector or
badly plugged in). Once the SD card is properly inserted, it may
take 5 seconds for the LED to turn off
Write Prot
Active when a read-only condition is detected (SD switch, BCD
switch or software read-only)
Busy
Do not pull the module while this LED is lit
Activity
Function as with a hard disk drive, flashes during data processing