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12.3 Precautions for System Configuration
12
MULTIPLE CPU SYSTEM CONFIGURATION
12.3 Precautions for System Configuration
This section explains the restrictions on configuration of a multiple CPU system where the
C Controller module is used.
(1) Restrictions on the number of mounted modules
The following indicates the modules having restrictions on the number of mounted
modules in a multiple CPU system.
Use them within the allowable ranges.
(a) When CPU No. 1 is C Controller module
Table12.8 Modules having restrictions on the number of mounted modules
Product Model name
Limit on number of mounted
modules per system
Limit on number of mounted
modules per CPU
Q series MELSECNET/H
network module
• QJ71BR11
• QJ71LP21-25
• QJ71LP21S-25
• QJ71LP21G
• QJ71LP21GE
Up to a total of 4 modules on PLC-to-
PLC network
Up to 4 modules on PLC-to-PLC
network
Q series CC-Link system
master/local module
• QJ61BT11
• QJ61BT11N
No limit
(Note that up to 8 modules can be
controlled by C Controller module)
Up to 8 modules
Interrupt module •QI60
Up to 4 modules
(Note that only 1 module can be
controlled by C Controller module)
Only 1 module
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