WD3A: special function module write instruction, K0: module number. K1: Analog input channel K1 or K2 (physical interface number); D15: Analog module writes the specified value. Meaning: Write D15 value of 0N3A module D / A.
RD3A: It is used when the external analog output module uses instructions such as fx2n-2da analog output. The FROM instruction is used when an external analog input module is fx2n-4ad analog input, for example.
PLC ONE 