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APPEN-
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Appendix 3 Method of Replacing Basic Model QCPU or High Performance Model QCPU with Universal
Model QCPU
Appendix 3.5 Special Relay and Special Register
APPENDICES
App - 66
*1: The special relay can be used if the serial number (first five digits) of the Universal model QCPU is "10042" or later.
TableApp.45 Special relay not supported in the Universal model QCPU and measures (Continued)
Number Name/Description Measures
SM1780
*1
Power supply off detection flag
The Universal model QCPU does not store redundant power supply system
information in SM1780 to SM1783. Delete the corresponding sections. (SM1780 to
SM1783 are always off.)
SM1781
*1
Power supply failure detection flag
SM1782
*1
Momentary power failure detection
flag for power supply 1
SM1783
*1
Momentary power failure detection
flag for power supply 2
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