5 - 8 5 - 8
MELSEC-Q
5 ASSIGNMENT OF I/O NUMBERS
5.5 Concept of I/O Number Assignment
5.5.1 I/O numbers of main base unit and extension base unit
High Performance model QCPU assigns I/O numbers at power-on or reset according
to the following items.
As a result, High Performance model QCPU can be controlled without performing I/O
assignment using GX Developer.
To assign I/O numbers, follow the items below:
(1) Number of slots of base units
The numbers of slots of the main and extension base units are set according to
the Base mode setting. (For Base mode, see Section 5.3.)
(a) In Auto mode, the number of slots is determined as the available number of
modules mounted to each base unit.
For example, 5 slots are assigned to a 5-slot base unit, and 12 slots are
assigned to a 12-slot base unit.
(b) In Detail mode, the number of slots is determined as the one designated at
the "I/O assignment" tab screen in the “(PLC) Parameter" dialog box.
(2) Order of I/O number assignment
The I/O numbers are assigned to the modules from left to right consecutively,
starting from 0
H
assigned to the module on the right of the High Performance
model QCPU in the main base unit.
(3) Order of I/O number assignment for extension base units
The I/O numbers for extension base units continue from the last number of the
I/O number of the main base unit.
The I/O numbers are assigned to the extension base units from left (I/O 0) to right
consecutively, in the order in which the setting connectors of the extension base
unit are set.
(4) I/O numbers of each slot
Each slot of base units occupies the points of I/O numbers of the mounted I/O
modules or intelligent function modules (special function modules).
When 32-point input module is mounted on the right of High Performance model
QCPU, X0 to X1F are assigned as I/O numbers.
(5) I/O numbers of empty slots
If the base unit has empty slots mounted with no I/O modules or no intelligent
function modules (special function modules) are mounted, the points designated
at the "I/O assigment" tab screen in the “(PLC) Parameter" dialog box are
assigned to the empty slots. (Default value is 16 points.)
POINT
When the assignment of base units is conducted in Auto mode, the number of
empty extension stages is not assured even if the extension stage is skipped at the
stage number setting connector of the base unit. (Lower I/O numbers are assigned
first.)
To reserve empty extension stages for future expansion, use the PLC parameter to
set the base unit.
Содержание QCPU (Q Mode)
Страница 111: ...5 19 5 19 MELSEC Q 5 ASSIGNMENT OF I O NUMBERS MEMO ...
Страница 450: ...App 59 App 59 MELSEC Q APPENDICES MEMO ...