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number, 0 through 31, and a letter, L or H. Bits are allocated as shown in the fol-
lowing table.
Bits
AR03
allocation
AR04
allocation
AR05
allocation
AR06
allocation
00
0 L
8 L
16 L
24 L
01
0 H
8 H
16 H
24 H
02
1 L
9 L
17 L
25 L
03
1 H
9 H
17 H
25 H
04
2 L
10 L
18 L
26 L
05
2 H
10 H
18 H
26 H
06
3 L
11 L
19 L
27 L
07
3 H
11 H
19 H
27 H
08
4 L
12 L
20 L
28 L
09
4 H
12 H
20 H
28 H
10
5 L
13 L
21 L
29 L
11
5 H
13 H
21 H
29 H
12
6 L
14 L
22 L
30 L
13
6 H
14 H
22 H
30 H
14
7 L
15 L
23 L
31 L
15
7 H
15 H
23 H
31 H
3-5-5 SYSMAC LINK System Data Link Settings
AR 0700 to AR 0703 and AR 0704 to AR 0707 are used to designate word alloca-
tions for operating levels 0 and 1 of the SYSMAC LINK System. Allocation can
be set to occur either according to settings from an FIT or automatically in the LR
and/or DM areas. If automatic allocation is designated, the number of words to
be allocated to each node is also designated. These settings are shown below.
Operating level 0
Operating level 1
Setting
AR 0700
AR 0701
AR 0704
AR 0705
0
0
0
0
Words set externally (FIT)
1
0
1
0
Automatic
LR area only
0
1
0
1
allocation
DM area only
1
1
1
1
LR and DM
areas
Words per Node
The following setting is necessary if automatic allocation is designated above.
Operating level 0
Operating level 1
Words per node
Max. no.
AR 0702
AR 0703
AR 0706
AR 0707
LR area
DM area
of nodes
0
0
0
0
4
8
16
1
0
1
0
8
16
8
0
1
0
1
16
32
4
1
1
1
1
32
64
2
The above settings are read every cycle while the SYSMAC LINK System is in
operation.
3-5-6 Error History Bits
AR 0713 (Error History Overwrite Bit) is turned ON or OFF by the user to control
overwriting of records in the Error History Area in the DM area. Turn AR 0713 ON
to overwrite the oldest error record each time an error occurs after 10 have been
recorded. Turn OFF AR 0713 to store only the first 10 records that occur each
time after the history area is cleared.
Optical I/O Unit and I/O
Terminal Error Flags
External/Automatic
Allocation
AR Area
Section 3-5