Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 262)

API Library of Routines
Appendix B
TAG_UNLOCK
B-131
This function unlocks the requested TAG memory area.
C Syntax
#include <copro.h>
unsigned TAG_UNLOCK (tag)
unsigned tag
or
char *tag;
Parameters
tag
Use to access the TAG table. This can be either the symbolic TAG or
the handle returned from a TAG_LINK or TAG_DEFINE call.
Returns
Value Symbolic Name Meaning
0 CC_SUCCESS Operation successful
120 CC_E_BADID TAG define ID out of range
176 CC_E_NOTAG TAG not found
178 CC_E_NOTLOCKER Caller is not the locker of this TAG
185 CC_E_NOTLOCKED TAG is not locked
Description
Use the TAG_UNLOCK function to unlock the TAG locked by
TAG_LOCK.
Important: This function must be called after access to the TAG is
completed; otherwise, the system may hang.
TAG_UNLOCK