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5.1 Basic Concept of Redundant System
5.1.4 System Consistency Check
5
REDUNDANT SYSTEM FUNCTIONS
(3) Basic System Configuration Consistency Check
(a) Check points
The basic system configuration consistency check means checking the
followings:
(If the number of slots of the main base unit has been set in the PLC parameter I/
O assignment, only the specified number of slots will be checked.)
• CPU module model
• Model and type of modules mounted on each slot in the main base unit
• Network module mode settings
A consistency check is not executed for the followings:
• Model of battery set in the CPU module
• Main base unit model and number of available slots
• Serial Nos. of modules mounted in the main base unit
• Number of power supply modules mounted in the main base unit
• Model of power supply modules mounted in the main base unit
• Slots set to "Open" in the PLC parameter I/O assignment
• Modules being replaced online
• Modules mounted on slots after the number of those in the PLC parameter
I/O assignment
Diagram 5.14 Basic system Configuration Consistency Check
Control
system
Standby
system
Tracking cable
Q12PRHCPU
MODE
RUN
Q25PRHCPU
MODE
RUN
An error occurs because the CPU module type name is different
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