I/O Address Assignment; Rules For Assigning I/O Addresses - Fuji Electric MICREX-SX series SPF User Manual

Section 2 System Configuration

2-3 I/O address assignment

2-3-1 Rules for assigning I/O addresses

In MICREX-SX series SPF, follow the rules below to assign I/O addresses.
<For Expert (D300win)>
Prefix
Unit No.
｛
Input: %IX (bit), %IW (word), %ID (double-word)
Output: %QX (bit), %QW (word), %QD (double-word)
<For Standard>
Identifier Unit No.
｛
Input: X (bit), WX (word), DX (double-word)
Output: Y (bit), WY (word), DY (double-word)
1) Unit No.
A number (1 to 6) is assigned to SPF expansion right side units, in their connected order. The number assigned to the main unit
is always "0" (zero). The front board is assigned "100" (fixed) as an independent unit and the expansion left side unit with "200"
(fixed).
<Example of unit No. assignment>
Expansion
left side unit
Unit No. 200
2) Word No. and bit address
To each SPF unit, words starting from the word 0 (zero) are assigned for the number of words that the unit occupies. No same
word is assigned to both input and output. Therefore, for main unit and expansion units with both inputs and outputs, words are
assigned first to inputs and then to outputs. All types of main units (regardless of the No. of I/O points provided) occupy eight
words of the I/O area (input: four words, output: four words).
Period
Word No.
Period
Word No.
Main unit Expansion
Unit No. 0 right side unit
Unit No. 1
Front board
Unit No. 100
Period
Bit address
(0 to 15)
Bit address
(0 to F)
Expansion
right side unit
Unit No. 2
2-8
Expansion
right side unit
Unit No. 3