IAI America XSEL-S - Manual (Page 36)

Chapter 3 Operation (Construction for Network)
30
IA Net
XSEL-R/S
(3) Input and Output Port on XSEL Controller for IA Net
Extended Input Ports No. : Select 256 points in a raw from 1000 to 3999
Extended Output Ports No. : Select 256 points in a raw from 4000 to 6999
These are the input and output port numbers used for the communication among the extension
units and XSEL controllers.
IA Net exchanges data between controllers in units of words (16 bits).
The station numbers one to four that XSEL controllers can occupy include the number of the
stations occupied by extension I/O units.
The output of PIO boards on an extension I/O unit is treated as an extension output port on the
occupying XSEL controller, thus the number of the stations XSEL controller occupies is up to
four stations including any extension I/O unit output assignments.
The number of stations an XSEL controller will occupy when used with an extension I/O module
varies depending upon how many slots of the extension I/O module are occupied by the XSEL
controller. The XSEL occupies from 1 to 4 stations; 1 station for each slot of occupied extension
I/O moudle.
It is possible for more than one XSEL controller to occupy an extension I/O module. One XSEL
can copy some extension I/O slots, while another XSEL can occupy other slots.
The input and output signals of an extension I/O unit can be read as input data from all the
XSEL controllers in the IA Net network.
On an extension I/O unit, four PIO boards can be mounted (4 slots), and there are three types
of input and output as shown below. Therefore, three are a maximum of 192 input points, and a
maximum of 192 output points (48 inputs x 4 slots, 48 outputs x 4 slots).
1) Input 32 Points/Output 16 Points
2) Input 16 Points/Output 32 Points
3) Input 48 Points/Output 48 Points