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 buffer. One value is stored per channel. The values are
sent to the PLC when the user program sends a defined 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 configuration of the module is done in PG5 Device Configurator. The user
program can read the input values or input configurations by specific registers.
8.2
Preparing the PLC system
The PCD used for the module PCDx.W380 must be updated with a firmware
version 1.22.28 or higher. Please, download the last firmware version from the
support website and load it in the PCD with the PG5 Firmware Downloader Tool.