In This Video, We will learn about MCR Instruction in RSLogix 500. This is Very Important Program Control Instruction.

This output instruction (sometimes known as "Zone Control") is used to set up areas or "zones" of your ladder program where all non-retentive outputs may be disabled at the same time for the same length of time. It is used in pairs, one MCR to define the start of the ladder area to be affected and one MCR to define the end of the area.

An input instruction is programmed on the rung of the first MCR to control rung logic continuity. When the rung goes "false" all non-retentive outputs within the controlled zone are disabled. When the rung goes "true" all rungs are scanned according to their normal rung conditions (disregarding the zone control instruction).

Note: Do not use conditional logic before an ending MCR instruction. The ending MCR instruction must be the only instruction on the rung.

#MCR #MasterControlReset #ProgramControl #MCRInstruction #AllenBradley #PLCProgramming

свернуть