3. Instruction Set
3-253
M1001
M1161
D100 D1
20
K4
K7
RS
X0
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
ETX1 ETX2
Registers for received data,
starting from the lower 8 bits
of D120
STX
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)