27
Advanced Instructions
Shared Memory instruction - READ in WinFPST
[Programming Example]
S1: Installation slot number of SCU unit.
S2: Starting address of shared memory
where source data is stored.
n: The number of words of source data
to read.
D: Starting address of PLC CPU where
to store the read data.
[
F150 READ
, S1, S2, n, D
]
K3: SCU slot (slot 0)
K251: SCU shared memory address
(Address 251)
K2: The number of words of data to
read (2 words)
DT15: Starting word operand of PLC
CPU where to store the read
data (DT15)
When R0 is on, the SCU shared memory address 251 (CH1 receiving buffer) reads
two words of data and send it to NX700 PLC CPU data registers, DT15 and DT16.
[
F150 READ
, K3, K251, K2, DT15 ]
RO
• The operands (called device, data, or register in other
company’s products) can be divided into
bit
operand
that processes bit information and
word
operand
that processes word information.
Word operand:
WX, WY, WR, WL, Ld, DT, FL, EV, SV,
IX, IY.. I0 to ID
Contact operand:
X, Y, R, L, T, C... .
• F150 (READ) instruction processes word, so 10byte
data is processes as 5 words.
IMPORTANT
