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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 - 67
Appendix 3.5 Special Relay and Special Register
The Universal model QCPU does not support the use of the special relay and special register described in Appendix
3.5.1 and Appendix 3.5.2.
Replace them using the method described in the table or delete the corresponding sections.
Appendix 3.5.1 Special relay list
TableApp.41 lists the special relay not supported in the Universal model QCPU and measures to be taken.
(To the next page)
TableApp.45 Special relay not supported by the Universal model QCPU and measures
Number Name/Description Measures
SM80 CHK detection
The Universal model QCPU does not support the CHK
instruction. For the replacing method of the CHK
instruction, refer to Appendix 3.3.3.
SM91
Step transition monitoring timer start
The Universal model QCPU does not support the step
transition monitoring timer function. For the replacing
method of this function, refer to “Appendix 3.
Restrictions and replacing 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
Operation of SD250 is not necessary. The Universal
model QCPU always stores the largest mounted I/O
number in SD250. Delete the corresponding sections.
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 sections.
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.