4-2.P/W PC Link
37
Checking a Send Area Overlap Error(P/W LINK 1 : DT9170, P/W LINK 2 : T9200, P/W LINK 3 : DT9230)
When a send area overlap error occurs, the overlapped station numbers(UNIT NO.) can be found. These special
data registers are useful to search a send area overlapped station when the error occurs.
The contents of the special data registers are configured as follows ;
1 : Overlapped
0 : Not overlapped
Bit data corresponding to overlapped stations bcome "1".
[EXAMPLE]
1 : Overlapped
0 : Not overlapped
Send area overlap stations
: Station numbers(UNIT NO.) 1 and 3.
Checked from
: Station number 1(UNIT NO. 1)/LINK 2(P/W PC LINK 0)
Special data register
: DT9200
Contents of DT9200
: “0000000000000101”[0005(H)]
Special
data
Description
register
address
DT9170
Indicates the station numbers(UNIT NO.) where the send area is overlapped in the P/W
LINK 1 network.
DT9200
Indicates the station numbers(UNIT NO.) where the send area is overlapped in the P/W
LINK 2 network.
DT9230
Indicates the station numbers(UNIT NO.) where the send area is overlapped in the P/W
LINK 3 network.
Bit position 15 •
• 12 11 •
•
8
7
•
•
4
3
•
•
0
Overlapped
station
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
(UNIT NO.)
DT9200
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
Bit position 15 •
• 12 11 •
•
8
7
•
•
4
3
•
•
0
Overlapped
station
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
(UNIT NO.)
