Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual - Manual (Page 444)

Glossary
Appendix D
D-25
ZCL Instructions
A user-program fence for ZCL zones.
ZCL Zones
Assigned program areas which may control the same outputs through
separate rungs, at different times. Each ZCL zone is bound and controlled
by ZCL instructions. If all ZCL zones are disabled, the outputs would
remain in their last state.
Z