Mitsubishi MELSEC Q Series

6
I/O NUMBER ASSIGNMENT
6.1 Relation between No. of Base Units and No. of Slots
6 - 2
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
SETTING AND PROCEDURES
6
I/O NUMBER ASSIGNMENT
7
MEMORIES AND FILES
8
INSTALLING / UNINSTALLING
(2) Precautions for the number of mounted modules
Mount modules within the range of the allowed number of slots.
Even if the total number of slots for a main base unit and extension base units is
greater than the number of available slots (for example, six 12-slot base units are
used), no error will occur as long as modules are mounted in slots whose number is
within a valid range.
An intelligent function module assignment error (error code: 2124, SP.UNIT LAY
ERR.) will occur if any module is mounted in the slot exceeding the number of
available slots.
Figure 6.1 Configuration example
Main base unit
CPU 0 1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31 32 33 34 35
36 37 38 39 40 41 42 43 44 45 46 47
48 49 50 51 52 53 54 55 56 57 58 59
60 61 62 63
Q312B
Q612B
Q612B
Q612B
Q612B
Q612B
Extension 1
Extension 2
Extension 3
Extension 4
Extension 5
Slot number
Power supply
module
C Controller module
Prohibit Prohibit Prohibit Prohibit Prohibit Prohibit Prohibit Prohibit
Modules can be
installed.
Modules cannot be installed.
(Installing modules will result in error.)
Extension base unit