APPENDICES
Appendix 1 Link Special Relay (SB) List
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APPENDICES
Appendix 1 Link Special Relay (SB) List
The link special relay (SB) is turned ON/OFF depending on various factors at data link.
The link special relay (SB) can grasp the data link error status by using it in a sequence
program or monitoring it.
(1) Application of link special relay (SB)
The status of the CC-Link IE controller network module can be checked with other
than GX Developer, using link special relay (SB).
(2) Mounting multiple network modules
The link special relay (SB) of each network module is refreshed by the link special
relay (SB) of the CPU module shown below when the refresh parameters of each
network module remain default.
(3) Range turned ON/OFF by user and range turned ON/OFF by system
The following shows the range when the assignment range of link special relay (SB) is
SB0000 to SB01FF.
• Range turned ON/OFF by user: SB0000 to SB001F
• Range turned ON/OFF by system: SB0020 to SB01FF
(4) Link special relay (SB) list
Table App.2 is a list of link special relays (SB) when they are assigned to SB0000 to
SB01FF.
POINT
(1) Do not turn ON the area of the No. which does not exist in the link special
relay (SB) list.
Turning ON the area of the No. which does not exist in the list may cause
malfunction of the programmable controller system.
(2) For how to use link special relay (SB), refer to the following.
Section 8.3 Using Link Special Relay (SB) and Link Special Register (SW)
Table App.1 Mounting multiple network modules
Item
Module 1
Module 2
Module 3
Module 4
Device No.
SB0000 to SB01FF
SB0200 to SB03FF
SB0400 to SB05FF
SB0600 to SB07FF
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