MC (Master Control): the master instruction or directive public contacts connected in series, used to represent the beginning of the master zone.MC directive can be used to output relay and auxiliary relay m y (does not include special auxiliary relays).MCR (MasterControl Reset): master reset instruction instructions MC, used to represent the end of the master … Continue reading PLC master instruction MC (Master Control) and master reset instructions MCR (MasterControl Reset)

ORB (Or Block): Multitouch circuits connected in parallel directive.ANB (And Block): Multitouch circuit block directives connected in series.Multitouch ORB instructions circuit block (usually a series circuit) circuit in front of and parallel, with no component number, equivalent circuit between a vertical line on the right. Parallel circuit to start contacts with LD or LDI instruction, … Continue reading PLC series-parallel circuit block command ORB (Or Block), ANB (And Block