Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 261)

API Library of Routines
Appendix B
TAG_UNDEF
B-130
BASIC Example
The BASIC function code is 61.
DIM status : INTEGER
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rem * TAG_UNDEF - undefine the tag “Fred” created by my process
RUN AB_BAS (61,status,“Fred”)
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References
TAG_DEFINE(); TAG_DEF_AVAIL(); TAG_LINK();
TAG_GLOBAL_UNDEF();