Parameter Setting; Parameter Storage Area; Parameter Setting And Start Of The Data Link - Mitsubishi Electric NF250-SEV Programming Manual

4.2 Parameter setting

This section explains the parameter setting necessary for the establishment of communication between the sequencer
CPU and the MDU.

4.2.1 Parameter storage area

This section explains the relation between the parameter area of the sequencer CPU and the parameter memory of the
master station.
(1) Parameter area of the sequencer CPU
This is an area where the basic values to control the sequencer system is set. The network parameter to control the
CC-Link system and the automatic refresh parameter are also set in this area.
(2) Parameter memory of the master station
This is an area where the network parameter of the CC-Link system is stored.
When the power supply of the unit is turned off or the sequencer CPU is reset, the network parameter disappears.
However, every time the power supply is turned on or the sequencer CPU is reset, the network parameter is set
from the sequencer CPU.
Sequencer CPU
Parameter area
CC-Link system
network parameter
Automatic refresh
parameter area

4.2.2 Parameter setting and start of the data link

The setting of the network parameter for starting the data link and the setting of the automatic refresh parameter for
executing the automatic refresh are made from GX Developer. The figure below shows the procedure from the parameter
setting by GX Developer to the start of the data link.
Using GX Developer, the
network parameter and the
automatic refresh parameter
are created and written in the
sequencer CPU.
When the sequencer system
is powered ON or the
sequencer CPU is reset, the
network parameter in the
sequencer CPU is transferred
to the master station and the
data link automatically starts.
Note：The parameter setting by GX Developer has the following characteristics.
Setting by GX Developer
area
GX Developer
Network
parameter
Automatic refresh
parameter
GX Developer
Network
parameter
Automatic refresh
parameter
Necessity of the
program for setting
the parameter
Not necessary
Power ON
CPU reset
Sequencer CPU
CC-Link system
parameter area
Network
parameter
Automatic refresh
parameter
Sequencer CPU
CC-Link system
parameter area
Network
parameter
Automatic refresh
parameter
Number of
Automatic
attachable
refresh
units
○
7
Master station
Parameter memory
CC-Link system
network parameter
area
Master station
Parameter memory
Network
parameter
Master station
Parameter memory
Network
parameter
Parameter change while
the sequencer CPU is
running
4 x
KGA120334-C