DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

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
of D120
ETX1
ETX2
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
X0
M1161
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 D122H D123L
STX
Registers for received data,
starting from the lower 8 bits
of D120
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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