PLC typical instructions

plc

#1

XIC ( Examine ON): Examine a bit for an ON condition.

XIO (Examine OFF): Examine a bit for OFF condition.

OTE (Output energize): Turn ON a bit ( non retentive)

OTL (Output latch): Latch a bit (retentive)

OTU (output unlatch): Unlatch a bit (retentive)

TOFF ( timer off delay): Turn an output ON/OFF after its rung has been OFF a preset time interval.

TON (timer on delay): Turn an output ON/OFF after its rung has been ON a preset time interval.

CTD ( Count down ): Use a software counter to count down from special value.

CTU (Count up): Use a software counter to count up to a specified value.