26 REDUNDANT FUNCTION
26.3 Tracking Transfer
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26
Tracking data
The following table lists the tracking data that can be transferred from the control system to the standby system.
*1 The data that is used in a program executed in both systems is not transferred. ( Page 418 Program Execution in Both Systems)
*2 Global labels with devices assigned are not transferred as global labels. They are transferred according to the tracking transfer settings
of the assigned devices.
*3 During online change on both systems or on the control system only, only system data is transferred. During online change on the
standby system only, data is transferred according to the table.
*4 During online change on the control system, system data and device data (global devices except step relay (S)) are transferred. During
online change on the standby system, data is transferred according to the table.
*5 This applies to the module labels of modules on the extension base unit in the module label assignment area. (The module labels of
modules on the main base unit are excluded.)
*6 When the module using the module label is set to "Empty" in the system parameters, tracking data is not transferred for the module
label.
Item Operation mode Reference
Backup mode
*3
Separate mode
*4
Device data User device
(Except step relay (S))
Page 390 Devices that can be
specified
Special relay (Auto transfer) Page 391 Special relay
Special register (Auto transfer) Page 392 Special register
Global label
*2
(Except module labels)
Page 398 Detailed setting
Module label (main base unit)
Module label (extension base unit)
*5*6
*5*6
Local device
*1
Local label
*1
Signal flow memory
*1
Page 396 Tracking transfer setting
for the signal flow memory
SFC information (Auto transfer)
PID control instruction information (Auto transfer) Page 392 PID control instruction
information
CPU buffer memory
System data (Auto transfer) (Auto transfer) Page 392 System data
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