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5.6 Online Program Change for Redundancy
5.6.2 Program Change While CPU is Running
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REDUNDANT SYSTEM FUNCTIONS
(3) Tracking Execution During Online Program Change
Use the special relay "SM1710" (Transfer tracking data during online program change
enable flag) to enable or disable the tracking execution of the following control data
during online program change.
• Internal device (Table5.44)
• Special relay (Table5.46)
• Special register (Table5.47)
• SFC data (Section 5.5.3 (2))
• PID control instruction data (Section 5.5.3 (2))
Make sure to set SM1710 to on or off (whether or not to execute tracking) before
executing online program change.
If the special relay is turned on during online program change, tracking will not be
executed.
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