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(4) When a multiple CPU high speed main base unit (Q3DB) is used
(a) Available modules, the number of extension base units, and the number of
mountable modules
*1 For the CPU modules that can be combined and their mounting positions, refer to Page 37, Section 3.1.2.
(b) Precautions
• If I/O modules are mounted exceeding the maximum number, "SP.UNIT LAY ERR" (error code: 2124)
occurs.
• "Number of CPU modules" indicates the number set in "No. of PLC" of PLC parameter ("Multiple CPU
Setting").
• When a C Controller module which occupies three slots is used, the maximum number of mountable I/O
modules will be two smaller than the number defined in the table on Page 36, Section 3.1.1 (4) (a).
• A PC CPU module occupies two slots. When this module is used, the maximum number of mountable I/O
modules will be one smaller than the number defined in the table on Page 36, Section 3.1.1 (4) (a).
Item Description
Number of CPU
modules
2 CPU modules
CPU No.1 (Basic model QCPU)
CPU No.2 (C Controller module or PC CPU module)
Applicable CPU
module
*1
Basic model QCPU Q00CPU, Q01CPU Function version B or later
C Controller module
Q06CCPU-V, Q06CCPU-V-B,
Q12DCCPU-V, Q24DHCCPU-V,
Q24DHCCPU-LS
No function version restriction
PC CPU module
PPC-CPU686(MS)-64,
PPC-CPU686(MS)-128,
PPC-CPU852(MS)-512
Manual for the PC CPU
module used
Maximum number of
extension base units
4 extension base units
Maximum number of
mountable I/O
modules
25 - (Number of CPU modules)
Applicable main base
unit
Q35DB, Q38DB, Q312DB
Applicable extension
base unit
Type requiring no power supply
module (Q series)
Q52B, Q55B
Type requiring power supply module
(Q series)
Q63B, Q65B, Q68B, Q612B
Applicable extension
cable
QC05B, QC06B, QC12B, QC30B, QC50B, QC100B
Applicable power
supply module
Q61P-A1, Q61P-A2, Q61P, Q61P-D, Q62P, Q63P, Q64P, Q64PN