Panasonic FP7 Series - CRD (File Data Read Instruction)

18.4 CRD (File Data Read Instruction)
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Ladder diagram
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List of operands
Operand Description
S1
Path name (folder name + file name: 1 to 256 characters) of the file from which data is read and the
number of characters or the starting address of the stored device (data format: character data)
S2
Starting address of the device that stores the parameters related to the data to be read (data
format: unsigned 16-bit integer)
n Number of read data (data format: unsigned 16-bit integer)
D
Starting address of the device where the data to be read is stored (data format: unsigned 16-bit
integer)
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Devices that can be specified (indicated by ●)
Operan
d
16-Bit device:
32-Bit
device:
Integer
Real
numbe
r
St
rin
g
Index
modifie
r
(Note 1)
W
X
W
Y
W
R
W
L
W
S
S
D
D
T
L
D
U
M
WI
W
O
TS
C
S
TE
C
E
IX K Ｕ H SF
D
F
" "
S1 ● ● ● ● ● ● ● ●
S2 ● ● ● ● ● ● ●
n ● ● ● ● ● ● ● ● ●
D ● ● ● ● ● ● ●
(Note 1) Only 16-bit devices can be modified. (Integer constants and character constants cannot be specified.)
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Outline of operation
● This instruction reads [n] pieces of data from the file in an SD memory card specified by [S1]
according to the parameter specified by [S2], and stores it in the device starting with [D].
● A comma and a line break code (LF or CR+LF) are recognized as delimiters between data
pieces.
● If you specify ASCII data and read an odd number of bytes, only the lowest byte of the last
word is stored.
● If you specify binary data and read an odd number of bytes, H00 is stored in the highest byte
of the last word.
18.4 CRD (File Data Read Instruction)
WUME-FP7CPUPGR-12 18-19