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6.13.1 Reading Instruction of Life Expectancy of Code tag Information (LR)
Reading instruction of life expectancy of code tag information LR reads life expectancy information
(
)
that is stored in code tag.
Instruction code
Instruction : LR
Code : 524CH
(1) Operation timing
The following chart shows operating timing.
ON
External signal
OFF
ON
M1 OFF
Writing parameter
Store data to CPU
ON
Sequence program
OFF
TOP
FROMP
Request of executing
ON
identification instruction M340(RY4) OFF
Finish of
ON
ID instruction M212 (RX4)
OFF
ON
ID-BUSY M211(RX3) OFF
Communication code tag
ON
and read/write head
OFF
ON
Error detection M213 (RX5) OFF
(2) Explanation of operating
Following are about operating of timing chart.
Sequencer CPU
Processor
ON external relay M1, set instruction code,
with TO instruction then ON RY4.
ON RX3
Read/write
Code
Head
tag
Stores reading data with FROM instruction
from remote register of unit to device of
sequencer CPU when RX4 is ON.
Reading of life expectancy
OFF RY4
of code tag information
OFF RX3, RX4
<
>
Attention
It executes instructions for the number of retry times and occurs error in the case of code
(
)
tag is not present when r
eading instruction of life expectancy of code tag information LR
is executed.
Содержание BIS C-489-1 KBT02 Series
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