Saia-Burgess Controls AG
Hardware manual for PCD3 series │ Document 26-789 ENG19│ 2018-06-29
Addressing
Guidance
2-10
2
2.7 Addressing
The address of an I/O slot module is determined by its module slot in the
configuration.
Each PCD3 I/O slot module has 16 addresses (numbered from 0 to 15),
regardless of the actual number of inputs / outputs (16, 8, 6 or 4).
CPU:
CPUs serve LIOs as well as RIOs.
The addressing of the modules on a CPU looks like this:
Module slot 0 has the base address 0 (zero)
Module slot 1 has the base address 16
Module slot 2 has the base address 32
Module slot 3 has the base address 48
Each slot provides 16 addresses, regardless of the number of inputs /
outputs (16, 8, 6 or 4) per module. Additionally, 64 addresses are
available for the 4 slots.
RIOs:
RIOs are module carriers with standalone functions and are detatched
from the CPU through a network.
There is no direct access to the I/Os.
The configuration of the RIO is communicated (defined) by the PG5
network configurator of the CPU.
RIOs receive their function from the CPU over the network and can
use LIOs.
Addressing:
For addressing, the same applies as described under CPU.
LIOs:
LIOs are supplementary module carriers (PCD3.C100 / C110 / C200)
to a CPU or a RIO, thus expanding the number of module slots.
The address of the slot module is determined by the base address of
the module carrier within a configuration and its location on the module
carrier itself.
Addressing:
Module slot number
>= 4
I/O base address
>= 64
