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26 BASIC CONCEPT
26.7 Determination of Control System/Standby System
Program example
The following shows a program example and the overview of the operation.
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Execution determination of start-up processing
(0) Set an interlock signal (M0) to prevent the above program from being executed if the operating status of the CPU module is changed from STOP to RUN
during operation. Do not set the latch setting for the device and label used for the interlock signal.
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Signal initialization
(6) With the direct access output, the starting up (own system) (Y31) is turned on and the control system (own system) (Y32) is turned off.
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Standby time setting
(11)Set the standby time. For the system A (SM1632), set the standby time longer.
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Standby processing
(17) to (25)If the control system is started up with the on delay timer (X20), the system stands by temporarily. If both systems start up successfully, the system
does not stand by.
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Condition judgment of the other system
(32)When the other system is operating and the own system is the system B (DX21 AND SM1633) or when the own system checks that the other system has
already been started up as the control system (DX22), a stop error occurs on the own system.
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Output of the control system (own system)
(39)With the direct access output, the control system (own system) (Y32) is turned on and the other system is notified of the start-up of the own system as the
control system. The interlock signal (M0) turns on as well.
Содержание MELSEC iQ-R-R00CPU
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Страница 151: ...9 MONITOR FUNCTION 9 1 Real Time Monitor Function 149 9 MEMO ...
Страница 323: ...18 SEQUENCE SCAN SYNCHRONIZATION SAMPLING FUNCTION 321 18 MEMO ...
Страница 330: ...328 20 ROUTING SETTING 20 3 Precautions MEMO ...
Страница 423: ...26 BASIC CONCEPT 26 8 State Transition of the Redundant System 421 26 MEMO ...
Страница 524: ...522 30 MAINTENANCE AND INSPECTION FOR A REDUNDANT SYSTEM 30 1 Module Replacement in the Redundant System MEMO ...
Страница 1009: ...APPX Appendix 14 List of Available SQL Commands for CPU Module Database Access Function 1007 A MEMO ...
Страница 1014: ...1012 APPX Appendix 15 Added and Enhanced Functions MEMO ...
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