IAI America XSEL-S - Manual (Page 42)

Chapter 3 Operation (Construction for Network)
36
IA Net
XSEL-R/S
(3) Only one unit of the extension I/O unit can be connected to one unit of XSEL.
Make the extension I/O unit related to each XSEL with care to satisfy the required number of
output points defined in (2) and not to assign to the I/O board mounted in multiple I/O units.
Write the total number of input on the I/O board mounted in the related slot to the number of
input points on the extension I/O.
Draw extension I/O units below each XSEL in the diagram drawn in (Preparation) and also
draw arrows to show the relations.
Note One piece of I/O board (output port) cannot be controlled by multiple XSEL.
(Even if there is an excess output port, another XSEL cannot be assigned.)
Have the assignments based on the system construction map created by now.Print out the shared
memory assignment table and parameter setting table in the appendix in the end of this manual,
and write them down.
[Refer to [2] Examples for Parameter Setting and Shared Memory Assignment in the next page
and sections 3.2.1 to 3.2.4]
x Basic Flow to Create Assignment Table
Connected
to slot 1 to 3
Extension I/O
Unit 1)
1 2 3 4
Connected to
slot 4
Extension I/O
Unit 2)
1 2 3 4
Connected to
slot 1 to 4
Extension I/O
Unit 4)
Extension I/O
Unit 3)
1 2 3 4 1 2 3 4
Multiple
connected to
extension I/O units
XSEL
1st Unit
XSEL
2nd Unit
XSEL
3rd Unit
XSEL
nth Unit
XSEL Unit Number = Next Number
Yes
XSEL Unit Number = No. 1
Assign the output ports (those on occupied extension I/O units
excluded)
Assign the output ports on the occupied extension I/O units
Is the total four or less for occupied stations
on one unit of XSEL?
No
No
Yes
To the next page
Is assignment of outputs on all the connected
XSEL units completed?