454
28 FUNCTIONS
28.3 Tracking Transfer
28.3
Tracking Transfer
This function transfers the control data from the control system to the standby system and maintains the consistency of the
data in the two systems to continue operation of the redundant system when a failure or an error occurs in the control system.
• The control system CPU module sends tracking data to the standby system CPU module before the END processing. The
tracking data includes device/label data, special relay (SM), special register (SD), PID control instruction information, and
system data.
• The standby system CPU module receives the tracing data, and then reflects the received data on the device/label
memory.
• Tracking transfer is performed in both of backup mode and separate mode.
• Device/label data can be divided and transferred as required. To transfer device/label data within a desired range, set a
range of global devices to be transferred and whether to transfer local devices/global labels/local labels for each tracking
block and turn on the tracking triggers (SD1667 to SD1670) assigned for each tracking block.
• Up to 1M-word device/label data can be transferred in one scan.
• During an online change or when a stop error has occurred, tracking transfer is performed only for system data. (
• In the CPU parameter, "Tracking Device/Label Setting" is set to "Transfer collectively" by default. Thus,
tracking transfer is performed without setting the parameter. (
• When "Process Control Extension Setting" is enabled, the tracking transfer setting is automatically
configured in detailed settings. The range of the file register specified to the system resource of the optional
process control extension setting is registered to the tracking block No.64. (
"Process Control Extension Setting" is enabled)
When a tracking transfer is not performed, the possible causes are the following:
• The standby system CPU module has been powered off or reset.
• Hardware failure of the CPU module has occurred.
*1
• An error has occurred in the redundant function module.
*1
• A WDT error has occurred.
*1
• Tracking cables has been pulled out or disconnected.
*1 When the tracking communication line properly works, "Link-up" (event code: 00100) may be stored in the event history.
Control system
Standby system
Sending tracking data
Содержание MELSEC iQ-R-R00CPU
Страница 2: ......
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 ...
Страница 1027: ......