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MELSEC-
A
6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL
[2] About bank changing
When using the D75P2, the master station's automatic transmission/reception buffer is
used.
With the A Series master module (AJ61BT11/A1SJ61BT11), the automatic update
buffer and transmission/reception buffer are divided with banks. When accessing these
buffers, the bank must be changed.
POINT
When using dedicated commands (RIRD, RIWT), the bank is changed with the
dedicated commands, and does not need to be changed by the user.
After changing to bank 1 and then reading or writing, return to bank 0.
The information such as RX, RY, RWw or RWr will not be updated unless the
bank is changed to bank 0.
A Series master module buffer memory (AJ61BT11/A1SJ61BT11)
Bank 0 Bank 1 Bank 2
(Use prohibited for D75P2)
Intelligent device
station automatic
update buffer
Parameter, status
information, etc.
Intelligent device
station transmission
/reception buffer
FFF
H
M FFF
H
M FFF
H
M
0
H
M 0
H
M 0
H
M
(1) Changing the bank
The bank can be changed by turning the master module's Y(n+1)C, Y(n+1)D ON
and OFF.
n indicates the master module's head input/output No.
Y (n+1) C Y (n+1) D Details
OFF OFF Change to bank 0
ON OFF Change to bank 1
(2) Program
Create the program for changing the bank as shown below.
(a) Program for changing to bank 0
Changeover execution
(b) Program for changing to bank 1
Changeover execution