App
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Appendix 5 Method of replacing High Performance model QCPU with Universal model QCPU
APPENDICES
Appendix 5.5 SPECIAL RELAYS AND SPECIAL REGISTERS
The Universal model QCPU does not support the special relays and special registers
described in Appendix 5.5 and Appendix 5.5.
Replace them using the method described in the table or delete the corresponding parts.
Appendix 5.5.1 Special Relay List
TableApp.84 lists special relays not supported in the Universal model QCPU and
measures to be taken.
(Continued on next page)
TableApp.84 Special relays not supported in the Universal model QCPU and measures to be taken
Number
Name/Description
Measures to be taken
SM80
CHK detection
The Universal model QCPU does not support the CHK
instruction.For the alternative method of the CHK
instruction, refer to Appendix 5.3.
SM91
Step transition monitoring timer start
The Universal model QCPU does not support the step
transition monitoring timer function.For the alternative
method of this function, refer to "Appendix 3. Restrictions
and alternative method of the Basic model QCPU and
Universal model QCPU" in the "QCPU (Q Mode)/QnACPU
Programming Manual (SFC)".
SM92
SM93
SM94
SM95
SM96
SM97
SM98
SM99
SM250
Largest mounted I/O number read
The Universal model QCPU always stores the largest
mounted I/O number in SD250. The operation of this relay
is not necessary.Delete the corresponding parts.
SM255
MELSECNET/H
module 1
information
Indicates operative network or standby network
These are special relays for the simple dual-structured
network function.Since the Universal model QCPU does
not support this function, there is no application for these
special relays. Delete the corresponding parts.
SM256
At refresh from link module to CPU, selects
whether to read data from the link module.
SM257
At refresh from CPU to link module, selects
whether to write data to the link module.
SM260
MELSECNET/H
module 2
information
Indicates operative network or standby network
SM261
At refresh from link module to CPU, selects
whether to read data from the link module.
SM262
At refresh from CPU to link module, selects
whether to write data to the link module.
SM265
MELSECNET/H
module 3
information
Indicates operative network or standby network
SM266
At refresh from link module to CPU, selects
whether to read data from the link module.
SM267
At refresh from CPU to link module, selects
whether to write data to the link module.
SM270
MELSECNET/H
module 4
information
Indicates operative network or standby network
SM271
At refresh from link module to CPU, selects
whether to read data from the link module.
SM272
At refresh from CPU to link module, selects
whether to write data to the link module.
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