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MELSEC-
3 SPECIFICATIONS
3.7.2 Last station number setting (common to 2, 4 and 8 occupied stations (4 occupied
stations 2 modules): Address RWwn)
The setting status of the last station number is stored.
Bit Name Description Initial value
b0 to b7 Empty Fixed at 0
b8 to b13
Last station number
setting
Set the last station number for a data link.
This eliminates the processing of data link
to the non-connected stations, reducing the
link refresh time.
If the value is set beyond the number of
connectable stations (refer to Section
3.6.2), the setting will be ignored.
<Setting range>
2 occupied stations: Station 1 to 12
4 occupied stations: Station 1 to 28
8 occupied stations (4 occupied stations
2 modules): Station 1 to 56
If the value of 0 or more than 56 is set, a
data link is performed with the number of
stations within the setting range.
0
b14, b15 Empty Fixed at 0
3.7.3 Data link stop/restart instructions (common to 2, 4 and 8 occupied stations (4 occupied
stations 2 modules): Address RWwn+1)
Data link stop and restart are controlled. When a data link stop and a data link restart
are requested simultaneously, the data link stop has higher priority.
Bit Name Description Initial value
b0 Data link stop
0 : Data link stop not requested
1 : Data link stop requested
0
b1 to b14 Empty Fixed at 0
b15 Data link restart
0 : Data link restart not requested
1 : Data link restart requested
0
3.7.4 Error status flag clear (common to 2, 4 and 8 occupied stations (4 occupied stations
2 modules): Address RWwn+2)
Error of station outside control range is cleared.
Bit Name Description Initial value
b0 to b2 Empty Fixed at 0
b3
Error of station
outside control range
clear
0 : Clear not requested
1 : Clear requested
0
b4 to b15 Empty Fixed at 0
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