Mitsubishi Electric MELSEC Q Series User Manual page 74

(b) Outline of system configuration
Main base unit.........32-point modules are mounted on each slot.
Q312DB (12 slots occupied)
CPU
Q series power
supply module
CPU module 1
Extension base unit .........32-point modules are mounted on each slot.
Q612B (12 slots occupied)
12 13
Q55B (5 slots occupied)
24 25 26 27 28
Q68B (8 slots occupied)
29 30
Q68B (8 slots occupied)
37 38
*1: When the Q00UCPU,Q01UCPU,and Q02UCPU are used as the CPU module 1, up to second CPU modules can be
mounted. Therefore, the CPU modules 3 and 4 do not exist.
*2: When the Q00UCPU,Q01UCPU,and Q02UCPUCPU are used as the CPU module 1, CPU modules cannot be
mounted on the 26th slot or later, or 38th or later on the following conditions.
Therfore, if a module is mounted on the following conditions, an error "SP.UNIT LAY ERR.(error code: 2124)" occurs.
• Maximum number of slots for the Q00UCPU,Q01UCPU: 25 slots
• Maximum number of slots for the Q02UCPU: 37 slots
*3: When the Q00UCPU, Q01UCPU, Q02UCPU is used as the CPU module 1, up to four extensions can be connected.
Therefore, five to seven extensions do not exist.
Figure 2.16 System configuration example for using Q3 DB
0 1 2 3 4 5 6 7
CPU module 4
* 1
CPU module 3 * 1
CPU module 2
14 15 16 17 18 19 20 21 22 23
Q68B (8 slots occupied)
2nd
extension
Q68B (8 slots occupied)
* 2
3rd
extension
31 32 33 34 35 36
Q65B (5 slots occupied)
4th
39 40 41 42 43 44 extension
CHAPTER2 SYSTEM CONFIGURATION
8 9 10 11
...... Slot number
...... I/O number
1st
extension
45 46 47 48 49 50 51
53 54 55 56 57 58 59
7rd
61 62 63 extension
Error in mounting
3
*
5rd
52 extension
3
*
6rd
60 extension
3
*
2 - 26
1
2
3
4
5
6
7
8