Mitsubishi PLC set and reset command use example

Create Date: 2024-8-30 12:03:23|Source: Mitsubishi Electric/Mitsubishi Electric

1 SET Directive

The SET instruction is called an enthronement instruction. Its function is: to drive the coil, so that it has a self-locking function, and insists on the connection condition. In the diagram, when the moving contact X0 is closed, the SET command is executed to turn on the Y0 coil. After X0 is disconnected, the Y0 coil continues to be turned on, and the reset command RST must be used to cause the Y0 coil to lose power.

The operating elements of the set command are the output relay Y, the auxiliary relay M, and the condition relay S.

                                  Mitsubishi PLC set and reset command use example

2 RST Directive

The RST instruction is called the reset instruction. Its function is to reset the coil. In the diagram, when the moving contact X1 is closed, the RST command is executed to reset the Y0 coil. After X1 is disconnected, the Y0 coil continues to disconnect.

The operating elements of the reset command are output relay Y, auxiliary relay M, condition relay S, accumulator timer T, and counter C. It can also zero out the word elements D, V, and Z.
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