26 BASIC CONCEPT
26.7 Determination of Control System/Standby System
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• If both systems start up successfully, a stop error does not occur because an initial execution type program
is not executed on the other system.
• If a stop error has occurred in this program, the possible cause is a tracking cables failure. Check the
connection of tracking cables and power off and on or reset the CPU module on the system in which the
stop error has occurred.
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