IAI America XSEL-S - Manual (Page 44)

Chapter 3 Operation (Construction for Network)
38
IA Net
XSEL-R/S
(9) Set the number n, a multiple of 4, set in (8) to the unit number rotary switch on an extension
I/O unit.
  Example) If the top station number = 12, n = 3, therefore this extension I/O unit is No. 3.
Set the rotary switch to 3.
(10) Assign (Note 5) the output ports of other XSEL units that the first XSEL unit refers (inputs) to the
shared memory (input side) in the order from the smaller.
(11) Conduct (10) also to other XSEL units.
(12) When occupying the slots on an extension I/O unit and using input ports on the occupied
slots, check the number of used input ports on (2) in the table, and reserve the shared
memory (input side) required for each slot. Do not have it assigned (Note 6) yet.
(13) Have (12) conducted for all the XSEL units that the slots for extension I/O units are occupied.
(14) When referring (inputting) the input ports of the slots that another XSEL unit occupies, assign
(Note 5) the shared memory of the referred XSEL from (10).
 (15) Have (14) conducted also on all the XSEL units.
 (16) Finally, assign (Note 6) the shared memory reserved in (12).
Note 2 Be careful not to exceed the number of extension output ports on an XSEL controller.
(Extended Output Ports㧦Port No. 4000 to 6999)ޕ
Note 3 The number of stations that one unit of XSEL can occupy in the shared memory on the
output side is four.
Note 4 One station consists of four shared word domain with 16 bits, and there are domains of
64 bits.
Note 5 There is no limit in number of occupied stations in the shared memory on the input side.
Make sure not to exceed the number of extension input ports on an XSEL
controller.(Extended Input Ports㧦Port No.1000 to 3999)
Note 6 The assignment of the input ports on an extension I/O unit to be conducted at the last
after assignment of all other referred ports is completed.