Delta Electronics AH500, Manual

Page: 62 / 547

C h a p t e r 3 D e v i c e s
3 - 5
The procedure for processing a program is described below.
X0.0
Y0.0
Y0.0
M0
R egener ating input signals
Pr oc essing the program
R egener ating output s ignal s
Input
Input ter minals
The inp ut signa ls a re read
into the input memory.
Input memory
T he state of X0.0 is r ead from the i nput memor y.
3
Wri ting the
state of Y0.0
Readi ng the state of Y0.0
Wri ting the
state of M0
Output
Latch memor y
Output terminals
Output
D
e
vi
ce
m
e
m
o
ry
Regenerating an input signal:
1. Before an AH500 series motion
control module executes a
program, it reads the states of
the input signals sent to it into its
input memory.
2. If the states of the input signals
change during the execution of
the program, the states of input
signals stored in the input
memory will not change until the
AH500 series motion control
module reads the states of the
input signals sent to it next time.
. The time it takes for an input
device in the program to receive
the state of an external signal is
about 10 milliseconds. (The time
it takes for a contact in the
program to receive the state of
an external signal may be
affected by the time it takes for
the program to be scanned.)
Processing a program:
After the AH500 series motion
control module reads the states of
the input signals stored in the input
memory, the execution of the
instructions in the program will start
from the beginning of the program.
After the program is executed, the
states of the Y devices used in the
program will be stored in the device
memory in the AH500 series motion
control module.
Regenerating an output signal:
1. After M102 is executed, the
states of the Y devices stored in
the device memory will be sent to
the latch memory in the AH500
series motion control module.
2. The time it takes for an output
device to be turned form ON to
OFF is about 10~20
milliseconds.