SBC PCD2 Series - Block Diagram; Preparing the PLC System

Saia-Burgess Controls AG
Manual I/O-modules for PCD1 │ PCD2 series │ Document 27-600 – Release ENG09 │ 2019-05-01
8-12
PCD2.W380 & PCD3.W380
Preparing the PLC system
8
8.1.11 Block diagram
The PLC communicates with the module through the I/O Bus.
The data acquisition is independent of the rest. The input values are continuously
updatedintotheinternalbu󰀨er.Onevalueisstoredperchannel.Thevaluesare
senttothePLCwhentheuserprogramsendsadenedrequesttothemodule.
EEPROM
FPGA
Buffer
PLC
A
D
Input
config
SW
Input
Ch0 to
Ch3
Input
Ch4 to
Ch7
All channels are converted in
continuous, independently of
user program.
User program has access to the
buffer for reading input converted
values, but it has no access directly
to hardware.
I/O Bus
Module
Figure 7: Global diagram of module structure conception
ThecongurationofthemoduleisdoneinPG5DeviceCongurator.Theuser
programcanreadtheinputvaluesorinputcongurationsbyspecicregisters.
8.2 Preparing the PLC system
ThePCDusedforthemodulePCDx.W380mustbeupdatedwitharmware
version1.22.28orhigher.Please,downloadthelastrmwareversionfromthe
support website and load it in the PCD with the PG5 Firmware Downloader Tool.