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7-425
SP.FREAD
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7.18 Other instructions
7.18.13 Reading Data from Designated File (SP.FREAD)
Setting
Data
Meaning Setting Range Set by Data Type
+4
+5
File
position
Designate the file position to start reading when
binary data reading is designated by
.
00000000
H
: Starting at the beginning of the file
00000001
H
to FFFFFFFE
H
:From the designated position
The unit for the value is
determined by word/byte unit
designation.
FFFFFFFF
H
: Setting disabled
When CSV format read is specified at
• For the High Performance model QCPU of
which the first 5 digits of the serial number
are "01111" or lower, always set the
beginning (0
H
) of the file.
•For
the High Performance model QCPU/
Process CPU/Redundant CPU/Universal
model QCPU of which the first 5 digits of the
serial number are "01112" or higher, set the
file position (Row).
00000000
H
: Read starts at the beginning of
the file.
00000001
H
to FFFFFFFE
H
:Read starts at the specified row.
FFFFFFFF
H
: Read continues, starting at the
previous read position.
00000000H to
FFFFFFFF
H
User
BIN 16 bits
+6
No. of
columns
designation
When binary read is specified at , always
set 0.
When CSV format read is specified at , set
the number of columns from where data will
be read.
0: No columns. Regarded as one row.
Other than 0: Regarded as the specified
number of columns.
0H to FFFFH
(0 to 65535)
User
+7
Data type
specification
0: Word
1: Byte
0,1 User
Head number of the devices storing a file name. A file name is expressed as follows:
Device Item Contents/Setting Data Setting Range Set by
to
+
File name
character
string
Designate the character string of a file name.
• When omitting an extension, also omit
the "." (Period).
• Limit the file name within 8 characters +
period + 3 characters.
• When 9 or more characters are used,
the extension is ignored regardless of its
presence, and "BIN" or "CSV" is
automatically assigned as an extension.
Character
string
User
Head number of the devices for storing the read data.
Device Item Contents/Setting Data Setting Range Set by
Reading
result (No. of
read dat
a)
Contains the number of actually read data
against the data designated by +2. The
unit on the value depends on data type
specification.
––
System
+1 to
+
Reading
data
Read data
––
System
D0
D0
D0
D0
D0
D0
D0
D0
D0
S1
S1
S1
D1
D1
D0
D1
D1