AH500 Programming Manual Symbol: S ： Specified device Bit Explanation: When the instruction SET is driven, the specified device is set to ON. No matter the instruction SET is still driven, the specified device keeps ON. Users can set the specified device to OFF by means of the instruction RST. Example: 1. Contact B of X0.0 is loaded, contact A of Y0.0 is connected in series, and Y0.1 keeps ON. 2. When X0.0 is OFF, and Y0.0 is ON, Y0.1 is ON. Even if the operation result changes, Y0.1 still keeps ON. 5-8 Instruction code Operand Function SET S Keeping the device on Device DX DY X Y M SM S T C HC D L PR S ● ● ● ● ● ● ● ● ● ● ● ●