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CHAPTER 14 MODULE CHANGE DURING SYSTEM OPERATION
14
14.2 Change of Redundant Power Supply Module
14.2 Change of Redundant Power Supply Module
Following the flowchart shown below, change a faulty redundant power supply module online (with power on).
(It is assumed that the other redundant power supply module is normally operating.)
● If either redundant power supply module fails, change it for a normal one earlier than usual (within 14 days as a
guideline). If it does not fail, it is recommended to change the redundant power supply module for a new one after five
years have elapsed.
● Change the redundant power supply module with extreme care, referring to Page 71, Section 4.2.3 (1). If the module
fixing projection of the redundant power supply module comes off from the module fixing hole of the redundant base unit,
an error will occur due to connector damage.
● When the redundant power supply system is used, a "continue" error will occur due to a redundant power supply module
failure. Cancel the error after changing the faulty redundant power supply module for a normal one.
Note 14.2
● When the redundant power supply system is used, the failure status of the redundant power supply module can be
checked by the system monitor of GX Developer (Version 8.18U or later) or the special relay SM1781/special register
SD1781. Note 14.3
For details of the system monitor, refer to the following.
Operating manual for the programming tool used
Note 14.2
Failure of redundant power supply cannot be detected by the Basic model QCPU.
Note 14.3
When using the High Performance QCPU or the Process CPU, check the versions of the CPU module and programming
tool used. ( Page 637, Appendix 6)
Start
Completed
Check the redundant power supply
module to be changed.
Power OFF the redundant power supply
module to be changed.
Change the redundant power supply
module.
Power ON the new redundant power
supply module.
Make sure that the "POWER" LED is
turned on green.
Basic
High
performance
Process
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