Special I/O Instructions; I/O Read: Read(190) - Omron SYSMAC CV Series Operation Manual

Special I/O Instructions

Example
0000
00
(183)
FLSP

5-35 Special I/O Instructions

5-35-1 I/O READ: READ(190)

Ladder Symbol
(190)
READ N
Variations
j READ(190)
Description
404
When CIO 000000 is ON in the following example with the memory contents
shown, the contents of step 0050 will be overwritten with the contents of
ABCD.SFC. The structure of the SFC program will not change, but the contents
of the action block for step 0050 will be replaced with the contents of ABCD.SFC.
The extension ".SFC" is assumed and is not input.
#0050 0500
Word Leftmost
byte
CIO 0500 0 0
CIO 0501 4 1
CIO 0502 4 3
CIO 0503 2 0
CIO 0504 2 0
ST0050
ST0060
Action Block for Step 0050
AQ SV Action
N AC 0300
N AC 0310
N AC 0320
The Special I/O Instructions are used to write data to or read data from Special
I/O Units, such as an ASCII Unit. Refer to the operation manual of the Special I/O
Unit for details on the use and content of data transfers.
S D
When the execution condition is OFF, READ(190) is not executed. When the
execution condition is ON, READ(190) reads data from the memory area of the
Special I/O Unit allocated word S and transfers it to D through D+N–1. N indi-
cates the number of words to be read. S indicates the rightmost (first) of the two
words allocated for the Special I/O Unit (i.e., the input word).
Rightmost
byte
0 0 Indicates the Memory Card
4 2 A B
4 4 C D
2 0 Indicates end of name
2 0 Indicates end of name
03
ABCD.SFC
written into
step 0050.
07
FV
ABCD.SFC ABCD.SFC
written into
step 0050 step 0050.
Operand Data Areas
N: Words to transfer CIO, G, A, T, C, #, DM, DR, IR
S: Source word CIO
st
D: 1 destination word CIO, G, A, T, C, DM
Section 5-35
Address Instruction Operands
00000 LD
00001 FLSP(183)
Meaning
ST0050 03
ST0060 07
Action Block for Step 0050
AQ SV Action
N AC 0550
S AC 0580
N AC 0800
000000
#0050
0500
FV