Mitsubishi Electric Melsec A Series - Transient Instructions

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REPLACEMENT OF MELSECNET (II) AND /B (REMOTE I/O NETWORK)
3
3.6.2 Transient instructions
(1) MELSECNET dedicated instruction
Dedicated instructions that were used on MELSECNET must be replaced with the following dedicated
instructions on MELSECNET/H.
The following table shows a comparison between dedicated instructions on MELSECNET and
dedicated instructions on MELSECNET/H. The table also shows reference items in the Q
Corresponding MELSECNET/H Network System Reference Manual (Remote I/O Network). Check
these reference items before changing the sequence program.
The following describes operation by the instructions.
: Can be used, × : Cannot be used
MELSECNET (II) MELSECNET/H NET/H
Instruction
name
Category Description
Instruction
name
Category
Description of
change
Reference
item in the
manual
RFRP
Reading data
from remote
I/O station
The master station
reads the data of
special modules
mounted on remote
I/O stations.
REMFR
Reading data
from buffer
memory on
remote I/O station
intelligent function
modules
Reads data from
buffer memory on
a target remote I/O
station intelligent
function module.
Section
7.1.1
RTOP
Writing data
to remote I/O
station
The master station
writes data to
special modules
mounted on remote
I/O stations.
REMTO
Writing data to
buffer memory on
remote I/O station
intelligent function
modules
Writes data to
buffer memory on
a target remote I/O
station intelligent
function module.
Section
7.1.1
Instruction Name
Execution
station Description
Target station
Remote I/O
module
QCPU
REMFR
Reading from
buffer memory
on remote I/O
station
intelligent
function module
Reads data from buffer memory on a target remote I/O
station intelligent function module.
REMTO
Writing to buffer
memory on
remote I/O
station
intelligent
function module
Writes data to buffer memory on a target remote I/O
station intelligent function module.
CPU
Master module
Remote I/O
module
Buffer memory
221
REMFR
Word device
221
Intelligent
function module
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
CPU
754
REMTO
Master module
Remote I/O
module
Buffer memory
Intelligent
function module
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8