Transient Instructions - Mitsubishi Electric MELSEC-A Series Manual

3
REPLACEMENT OF MELSECNET (II) AND /B (REMOTE I/O NETWORK)

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.
MELSECNET (II)
Instruction
Category
name
Reading data
RFRP from remote
I/O station
Writing data
RTOP to remote I/O
station
The following describes operation by the instructions.
Instruction Name
Reading from
buffer memory
on remote I/O
REMFR
station
intelligent
function module
Writing to buffer
memory on
remote I/O
REMTO
station
intelligent
function module
Instruction
Description
name
The master station
reads the data of
special modules REMFR
mounted on remote
I/O stations.
The master station
writes data to
special modules REMTO
mounted on remote
I/O stations.
Execution
station
QCPU
Reads data from buffer memory on a target remote I/O
station intelligent function module.
CPU
REMFR
Word device
221
Writes data to buffer memory on a target remote I/O
station intelligent function module.
CPU
REMTO
MELSECNET/H
Description of
Category
Reading data
Reads data from
from buffer
buffer memory on
memory on
a target remote I/O
remote I/O station
station intelligent
intelligent function
function module.
modules
Writing data to Writes data to
buffer memory on buffer memory on
remote I/O station a target remote I/O
intelligent function station intelligent
modules function module.
Description
Remote I/O
module function module
Master module
Channel 1 Buffer memory
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Remote I/O
module function module
Master module
Buffer memory
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
NET/H
Reference
item in the
change
manual
Section
7.1.1
Section
7.1.1
: Can be used, × : Cannot be used
Target station
Remote I/O
module
Intelligent
221
Intelligent
754
3
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