Mitsubishi Electric Melsec A Series - Comparison of Dedicated Instruction

REPLACEMENT OF THE MELSECNET/10 (REMOTE I/O NETWORK)
5 - 30
5
5.1.7 Comparison of dedicated instruction
(1) A/AnS series
: Compatible, : Partial change required, × : Incompatible
(2) QnA/QnAS series
: Compatible, : Partial change required, × : Incompatible
Instruction name
Description
Compat-
ibility
Precautions for
replacement
A/AnS series
MELSECNET/10 module
Q series
MELSECNET/H module
ZNFR instruction
Reads data from the buffer
memory of special function
module in the target remote I/O
station.
Reads data from the buffer
memory of the intelligent
function module in the target
remote I/O station.
ZNFR instruction cannot
be used.
Change it to REMFR
instruction.
ZNTO instruction
Writes data to the buffer
memory of special function
module in the target remote I/O
station.
Writes data to the buffer
memory of the intelligent
function module in the target
remote I/O station.
ZNTO instruction cannot
be used.
Change it to REMFR
instruction.
Instruction name
Description
Compat-
ibility
Precautions for
replacement
QnA/QnAS series
MELSECNET/10 module
Q series
MELSECNET/H module
ZNFR instruction
Reads data from the buffer
memory of special function
module in the target remote I/O
station.
Reads data from the buffer
memory of the intelligent
function module in the target
remote I/O station.
ZNFR instruction cannot
be used.
Change it to REMFR
instruction.
ZNTO instruction
Writes data to the buffer
memory of special function
module in the target remote I/O
station.
Writes data to the buffer
memory of the intelligent
function module in the target
remote I/O station.
ZNTO instruction cannot
be used.
Change it to REMFR
instruction.
SEND instruction Sends data to target station.
RECV instruction Reads data sent by SEND instruction to device of CPU module.
READ instruction,
SREAD instruction
Reads the device data of other station.
WRITE instruction,
SWRITE instruction
Writes data to the device of other station.
REQ instruction
Issues "remote RUN/STOP" and "clock data read/write"
requests to other stations.
ZNRD instruction Reads the device data of other station.
ZNWR instruction Writes data to the device of other station.