Mitsubishi Electric MELSEC iQ-R-R00CPU, User Manual

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27 PROCEDURE FOR STARTING UP A REDUNDANT SYSTEM
27.1 Overview
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27
9.
Writing the system A/B setting
Set the system A or B with the engineering tool. (  Page 431 System A/B Settings)
10.
Writing data to the programmable controller
Write the set parameters and created programs to the CPU module with the engineering tool. (  Page 433 Writing Data to
the Programmable Controller)
11.
Resetting the CPU module
Restart the control system with either of the following methods.
• Powering on the system
• Resetting the CPU module
12.
Starting up the system
Perform the following operation on the engineering tool to start up the system as a control system within the time set in "Other
system Start-up Timeout Setting".
[Online]

[Redundant PLC Operation]

[Redundant Operation]
Select "Forced Start of Control System while Waiting for Other System to Start" and click the [Execute] button. (When "Other
system Start-up Timeout Setting" of "CPU Parameter" has not been changed, a stop error occurs in 60 seconds.)
Check that the CTRL LED of the redundant function module turns on.
When the CPU parameters have been set, users can start up only one system with the following operations.
(

Page 485 Redundant System Operation Setting)
• Switch operation: Set the RUN/STOP/RESET switch of the CPU module to the RUN, STOP, and then the
RUN position again.
• Input (X) operation: Turn on the input (X) set with the parameters.
13.
Checking the LEDs
Check that the LEDs of the CPU module and redundant function module are in the following states. The following figure
shows the LED status when own system is set as the system A in the system settings. The CARD READY LED status
depends on whether an SD memory card has been installed to the CPU module or not.
• Since only the control system has been started up, a continuation error occurs. Thus, the ERROR LED of
the CPU module and the L ERR LED of the redundant function module turn on. The BACKUP LED flashes
because a system switching failure cause has been generated.
• When "Watching Standby System Setting" of "CPU Parameter" is set to "Disable", the ERROR LED of the
CPU module will turn off.
To start up the system when the data logging function is used, refer to the following.

Page 427 Precautions on starting up the system when the data logging function is used
14.
Running a program
Set the CPU module to the RUN state and check that the PROGRAM RUN LED of the CPU module turns on.
15.
Monitoring the program
Check that the program is normally running on the engineering tool. (

Page 434 Monitoring the Program)