Programming; Programming Procedure - Mitsubishi MELSEC-A AJ71PT3 User Manual

5. PROGRAMMING
5. PROGRAMMING
The program for the MINI link depends on the type of I/O refresh
performed as explained below.
5.1 Programming Procedure
In a MINI link system, write initial data to the master module buffer
memory to perform I/O refresh.
The initial data must be written before Y18 is switched on.
!
Write the number of remote
110 stations.
(
Start
!
)
Initial data write······See Section 5.2.
•
Write the number of retries.
r - - - -
-.1._ ----,
I
Specify the
I
stations.
L. _
partial refresh I .
1·········See Section 5.4.2.
____ ....J
NO Communication stop
Read the remote I/O station
input data from the master ·········5ee Sections 5.3.2, 5.4.3.
module buffer memory.
Switch on Y1S.
*.-------'-------,
Switch off Y1a.
•
I
Perform sequence operation
in accordance with the input
data from the remote 110 sta-
tions.
*.-------'-------,
Write the ON/OFF data from
the remote 1/0 stations to the
master module buffer
memory.
·········5ee Sections 5.3.3, 5.4.4.
The step enclosed by
~::::;
is required only when partial refresh type
remote 1/0 units are used.
In the steps marked ". the buffer memory addresses differ between
batch and partial refresh types.
Fig. 5.1 Programming Procedure
5-1
18 (NA) 66164-A