618
37 FUNCTIONS
37.1 System Switching
■
Special relay
The following table shows the special relay for system switching and the storage status of the CPU modules in the control
system and standby system.
: Stored,
: Not stored
■
Special register
The following table shows the special register for system switching and the storage status of the CPU modules in the control
system and standby system.
: Stored,
: Not stored
*1 When the system switching has not been normally completed, a value is stored in this special register area of the control system.
CTRL LED and SBY LED of the redundant function module
System switching results can be checked with the CTRL LED and SBY LED on the front of the redundant function module.
SM
number
Name
Storage status at system switching
New control system
CPU module
New standby system
CPU module
SM1637
System switching detection (standby system to control system)
SM1643
ON for only one scan after system switching (standby system to control system)
SM1644
ON for only one scan after system switching (control system to standby system)
SM1645
System switching request from a network module
SM1646
System switching by a user
SD
number
Name
Storage status at system switching
New control system
CPU module
New standby system
CPU module
SD1642
BACKUP/SEPARATE LED flashing cause
SD1643
System switching cause
SD1644
Cause of system switching failure
SD1645
System switching request status from a network module of own system
SD1646
System switching request status from a network module of the other system
SD1648
Cause of the other system monitoring error
SD1649
System switching cause (when the systems are successfully switched)
SD1650
System switching instruction ID number
Switching from the standby system to the control system
Switching from the control system to the standby system
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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