TECO SG2 Series - Output Instructions

Chapter 4 Relay Ladder Logic Programming 47
Output Instructions
Set Output Instruction (Latch) (
¿
)
A set output instruction, or Latch, turns ON an output coil (Q) or an auxiliary contact (M) when the
preceding input contact transitions from OFF to ON. Once the output is ON or set, it will remain ON
until it is reset using the Reset output instruction. It is not necessary for the preceding input contact
controlling the Set output instruction to remain ON.
Reset Output Instruction (Unlatch) (
À
)
A reset output instruction, or Unlatch, turns OFF a previous set output coil (Q) or an auxiliary contact
(M) when the preceding input contact transitions from OFF to ON. Once the output is OFF or reset, it
will remain OFF until it is reset using another output instruction. It is not necessary for the preceding
input contact controlling the Reset output instruction to remain ON.