Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual Receiving data External equipment PLC

3. Instruction Set

Receiving data: (External equipment -> PLC)

D120L D121L D122L D123L D124L D125L D126L

STX	Registers for received data,
	starting from the lower 8 bits	ETX1	ETX2
	of D120
	length = 7

3.The STX and ETX of external equipments will be received by PLC in data receiving process,

therefore, care should be taken on the setting of operand n (Length of data to be received).

16-bit mode:

1.STX (Start of Text) and ETX (End of text) are set up by M1126 and M1130 together with D1124~D1126. When PLC executed RS instruction, STX and ETX will be sent out automatically.

2.When M1161 = OFF, the 16-bit mode is selected, i.e. both high byte and low byte of the 16-bit data will be received and transmitted.

M1001

M1161

X0

RS D100 K4 D120 K7

Sending data: (PLC -> external equipment)

STX D100L D100H D101L D101H ETX1 ETX2

Source data register, starting from the lower 8 bits of D100

length = 4

Receiving data: (External equipment -> PLC)

D120L D120H D121L D121H D122L

STX	Registers for received data,
	starting from the lower 8 bits
	of D120

D122H D123L

ETX1 ETX2

3.The STX and ETX of external equipments will be received by PLC in data receiving process, therefore, care should be taken on the setting of operand n (Length of data to be received)

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