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6 PARAMETER SETTING
MELSEC-QnA
6.2 Parameter Settings
The items to set in the master station's "parameter information area (address 0H to
5F
H)" in the buffer memory is shown in Table 6.1.
Refer to Section 3.5.2 for details of each item.
Table 6.1 Parameter setting items
Setting item Description
Buffer memory
address
Reference
Number of connected modules
Sets the number of modules in the remote and local stations
connected to the master station (including reserved stations)
Default : 64 (modules)
Setting range : 1 to 64 (modules)
1H
Section 3.5.2 (1)
(a)
Number of retries
Sets the number of retries when there is a communication error.
Default : 3 (times)
Setting range : 1 to 7 (times)
2H
Section 3.5.2 (1)
(b)
Number of automatic return
modules
Sets the number of remote and local stations that can be
recovered with one link scan.
Default : 1 (modules)
Setting range : 1 to 10 (modules)
3
H
Section 3.5.2 (1)
(c)
Operation specification when
CPU is down
Specifies the data-link status when the master station
programmable controller CPU has an error.
Default : 0 (stop)
Setting range : 0 (stop)
1 (continue)
6
H
Section 3.5.2 (1)
(d)
Reserved station specification
Specifies reserved stations.
Default : 0 (no setting)
Setting range : Turn on the bit corresponding to the station
number.
10H to 13H
Section 3.5.2 (1)
(e)
Invalid station specification
Specifies invalid stations.
Default : 0 (no setting)
Setting range : Turn on the bit corresponding to the station
number.
14
H to 17H
Section 3.5.2 (1)
(f)
Station information
Sets the connected remote and local station type.
Default : 0101
H (remote I/O station, occupies 1 station,
station No. 1) to 0140
H (remote I/O station,
occupies 1 station, station No. 64)
Setting range : As follows.
Station type
Number of
occupied stations
b15 to b12b11 to b8
Station number
b7 to b0
1 to 64
(01
H
to 40
H
)
1: Occupies 1 station
2: Occupies 2 stations
3: Occupies 3 stations
4: Occupies 4 stations
0: Remote I/O station
1: Remote device station
2: Intelligent device station (including local stations)
20H (1st station) to
5F
H (64th station)
Section 3.5.2 (1)
(g)