XIC (Examine If Closed)

XIC (Examine If Closed) is a fundamental ladder logic element or instruction used to implement control logic in PLC programs. Allen-Bradley normally open contact instruction, true when bit is 1. This instruction type enables programmers to create specific control behaviors, implement timing functions, or manage data within ladder logic programs. Understanding and properly utilizing XIC (Examine If Closed) is essential for developing effective ladder logic programs that meet application requirements.

The implementation of XIC (Examine If Closed) follows established conventions and best practices for ladder logic programming. Programmers must consider scan time impacts, proper placement within ladder rungs, and interaction with other instructions when using XIC (Examine If Closed). Common applications include sequential control, state machine implementation, and process interlocking. Effective use of XIC (Examine If Closed) contributes to clear, maintainable ladder logic programs that can be easily understood and modified by maintenance personnel.