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11 BASIC CONCEPT OF REDUNDANT SYSTEM
11.5 Operation Modes of a Redundant System
Link refresh In the standby system, data is not refreshed from devices of the
CPU module to link devices.
In the standby system, data is refreshed from devices of the CPU
module to link devices (only the link special relay (SB) and link
special register (SW)). (CC-Link is excluded.)
Writing data to the
programmable
controller
Data can be simultaneously written to both systems. Or, data can
be written to only a system specified in the connection
destination setting.
Data can be written to only a system specified in the connection
destination setting.
Remote operation
function
Remote operations can be performed on both systems. Remote operations by the engineering tool can be performed
only on a system specified in the connection destination setting.
Time synchronization Time of the standby system is synchronized with that of the
control system.
Time is not synchronized.
Item Backup mode Separate mode
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