568
35 BASIC CONCEPT
35.7 Scan Configuration
35.7
Scan Configuration
This section describes scan configurations of the CPU modules in a system using the SIL2 Process CPU.
Tracking transfer is performed during the END processing. (
For details on the scan configuration other than tracking transfer, refer to Chapter 1. (
The following figure shows scan configurations of when both systems are started up simultaneously.
Both systems perform different processing.
: Performed,
: Not performed
*1 Only the input refresh is performed. Whether or not to perform the output refresh depends on "Standby System Output Setting" of "CPU
Parameter". (
Page 652 Redundant System Operation Setting)
*2 The program operation is not performed with the default setting. Programs are executed according to "Both Systems Program
Executions Setting" in "Program Setting" of "CPU Parameter". (
Page 647 Program Execution in Both Systems)
Processing
Control system
Standby system
Initial processing/initial processing (when switched to RUN)
I/O refresh
Program operation
Tracking transfer
END processing
Program operation
Tracking transfer
CPU module is
switched to RUN
Initial processing
(when switched to RUN)
I/O refresh
Scan
time
END processing
Tracking transfer
CPU module is
switched to RUN
Initial processing
(when switched to RUN)
I/O refresh
Scan
time
END processing
Sending tracking data
Reception completion of
tracking data
<Control system>
<Standby system>
Operation of the program
executed in both systems
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: ......