![Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual Download Page 488](http://html.mh-extra.com/html/mitsubishi-electric/melsec-iq-r-r00cpu/melsec-iq-r-r00cpu_user-manual_239139488.webp)
486
28 FUNCTIONS
28.7 Redundant System Operation Setting
Standby system output setting
Output timing
When "Standby System Output Setting" has been set to "Enable", the output timing from the standby system in backup mode
is at the completion of the END processing or depends on the refresh group setting or refresh settings of each module. (
Page 65 Group setting for refresh)
Therefore, when a control system execution program is set in the refresh group setting, the I/O refresh is not performed while
the module is running because the program is not executed in the standby system. (When the CPU module is the STOP/
PAUSE state, the I/O refresh is performed at the timing of the END processing.)
To execute a program set in the refresh group setting in the standby system in backup mode, set "Both Systems Program
Executions Setting". (
Page 479 Program Execution in Both Systems)
Operation at system switching
The operation performed at standby system differs when "Standby System Output Setting" is set to "Enable". The following
table shows the operation performed when "Standby System Output Setting" has been set to "Enable".
For the program execution in both systems, refer to the following.
Page 479 Program Execution in Both Systems
Item
New control system CPU module
New standby system CPU module
Output (Y)
The status of the old standby system is held and output
refresh is performed.
The status of the old control system is held and output refresh
is performed.
Direct access output (DY)
In the program execution after system switching, data is
output when an instruction using the direct access output (DY)
is executed.
■
For program executed in both systems
In the program execution after system switching, data is
output when an instruction using the direct access output (DY)
is executed.
■
For program executed in the control system
No operation is performed because the program does not
operate.
Summary of Contents for MELSEC iQ-R-R00CPU
Page 2: ......
Page 151: ...9 MONITOR FUNCTION 9 1 Real Time Monitor Function 149 9 MEMO ...
Page 323: ...18 SEQUENCE SCAN SYNCHRONIZATION SAMPLING FUNCTION 321 18 MEMO ...
Page 330: ...328 20 ROUTING SETTING 20 3 Precautions MEMO ...
Page 423: ...26 BASIC CONCEPT 26 8 State Transition of the Redundant System 421 26 MEMO ...
Page 1014: ...1012 APPX Appendix 15 Added and Enhanced Functions MEMO ...
Page 1027: ......