Mitsubishi Electric MELSEC iQ-R Series User Manual page 61

14.
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 the own system is set as system A in the system settings. The CARD READY LED status (on or
off) depends on whether an SD memory card is inserted 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. In addition, the BACKUP
LED of the redundant function module flashes because a system switching disable cause exists.
• When "Watching Standby System Setting" of "CPU Parameter" is set to "Disable", the ERROR LED of the
CPU module will turn off.
15.
Checking the connection of the extension cables
When extension base units at extension level 2 and later are connected, check that the following LEDs are turned on.
• CONNECT LED for the extension cable connected to the extension base unit
• ACTIVE LED on either of the extension base units
To start up the systems one by one, complete the start-up process (steps 1 to 15 above) of one system first.
Then, start up the other system. During start-up of a system, the system cannot perform tracking
communications. For this reason, a stop error may occur in the CPU module of the system that was started up
later. In this case, restart the system in which the CPU module where a stop error has occurred. (When
automatic recovery is set, the system can be automatically restarted.) ( Page 430 Automatic recovery of
the CPU module of the standby system)
To start up the system when the data logging function is used, refer to the following.
Page 61 Precautions when the data logging function is used
16.
Executing the program
Set the CPU module to the RUN state and check that the PROGRAM RUN LED of the CPU module turns on.
17.
Monitoring the program
Check that the program operates normally on the engineering tool. ( Page 68 Monitoring the Program)
5 PROCEDURE FOR STARTING UP A REDUNDANT SYSTEM
5
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5.1 Overview