Saia-Burgess Controls AG
Hardware manual for PCD3 series │ Document 26-789 ENG19│ 2018-06-29
Storage space on the PCD3
PCD3.Mxxx0 Classic CPU and expansion enclosure
3-53
3
3.18.4
Memory structure of the SaiaPCD3 systems
Colour legend
RAM
μSD flash memory (internal)
Program DB/Text (ROM)
a
File system
f
DB / Text (RAM)
b
Flash memory expansions (optional)
File system (user area / alarming)
c
Extension module
f
Data / media (R/F/T/C, clock, history, etc.)
d
Operating system (OS, init data)
e
DB backup
The sizes of the colour blocks on this page and on the next page do not match the
effective memory size ratio!
PCD3.M2130V6
Flash memory
internally
RAM
SRAM
d
b
c
a
e
Backup
DB
PCD3.M2330 A4T5 WAC
f Extension module
Flash memory
Flash memory
extensions
RAM
SRAM
d
b
c
a
e
DB
f
Backup
DB
PCD3.M3120, PCD3.M3330
DB
Activ
ity
Busy
Write
Diag
User
Flash ROM expan-
sions
Flash memory
internally
RAM
SRAM
d
b
c
a
e
=
Slot0
Slot1
Slot2
Slot3
DB
DB
DB
f
Backup
DB
PCD3.M3160, PCD3.M3360
DB
Flash memoryμSD
card internal
d
b
c
f
a
b
e
Backup
Activ
ity
Busy
Write
Diag
User
Flash ROM
expansions
RAM
SRAM
=
DB
Slot0
Slot1
Slot2
Slot3
DB
DB
DB