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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 without a programming tool, 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
Link special relays (SB) for which SB0000 to SB01FF are assigned are listed on the following pages.
● 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.
● For how to use link special relay (SB), refer to the following.
Page 306, Section 8.3
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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