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4.
LINKING TO THE AnACPU (WITH DEDICATED INSTRUCTIONS)
AND THE AJ71 PT32-S3
MELSEC-A
(2) Writing data to the buffer of an A64RDC
(9
By executing instructions from LEDB MINI to TO (MINI-S3 dedicated
instructions) with the sequence program, data of the master module
and A64RDC is stored in the request-to-communicate registration
areas.
(9) By executing the PRC instruction, send data is written to the remote
terminal module send data areas in the master module according to
the TO instruction information stored in the request-to-communicate
registration area (TO).
(h) After writing the send data to the send data area
for the remote
terminal module, the data is stored to the buffer area
of the A64RDC
via the MINI-S3 link.
(i) When a send-completed signal is received from the A64RDC, the bit
device set with the PRC instruction is turned ON for one scan.
When communications is completed, the TO instruction information
stored in the request-to-communicate registration area is cleared.
(3)
Reading data from the A64RDC buffer
(j) By executing the sequence program, data of the master module and
A64RDC is stored in the request-to-communicate registration areas.
(k) By executing the PRC instruction, the FROM instruction information
stored in the request-to-communicate registration area is written to
the remote terminal module send data areas in the master module.
(I) When the data write is completed, the data is stored in the A64RDC
through the MINI-S3 link.
(m) When the A64RDC receives the FROM instruction information,
it
transmits the data stored in the
buffer back to the master module
using the address data of the information.
(n) Data received from the A64ADC is stored in the received- data areas
of remote terminal module.
(0)
Data stored in the remote terminal
module received-data areas is
stored in the word devices designated
by the FROM instruction
of
the sequence program.
(p) After storing the data received from the A64RDC buffer in the desig-
nated word devices, the AnACPU turns ON the bit device designated
by the PRC instruction for one scan. When
the communications is
completed, the FROM instruction information stored in the request-
to-communicate registration area is cleared.
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