27
SYSMAC NET Link Systems
Level 0
Level 1
Bit numbers in header/data link table entry numbers in table body
SW3-4
SW3-4
PC Error Flags
PC Run Flags
ON
OFF
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
SR 238
SR 242
SR 247
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
SR 239
SR 243
SR 248
9
10
11
12
13
14
15
16
9
10
11
12
13
14
15
16
SR 240
SR 244
SR 249
17
18
19
20
21
22
23
24
17
18
19
20
21
22
23
24
SR 241
SR 245
SR 250
25
26
27
28
29
30
31
32
25
26
27
28
29
30
31
32
PC Link Systems
When the PC belongs to a PC Link System, words 247 through 250 are used
to monitor the operating status of all PC Link Units connected to the PC Link
System. This includes a maximum of 32 PC Link Units. If the PC is in a Multi-
level PC Link System, half of the PC Link Units will be in a PC Link Subsys-
tem in operating level 0; the other half, in a Subsystem in operating level 1.
The actual bit assignments depend on whether the PC is in a Single-level PC
Link System or a Multilevel PC Link System. Refer to the
PC Link System
Manual
for details. Error and Run Flag bit assignments are described below.
Bits 00 through 07 of each word are the Run flags, which are ON when the
PC Link Unit is in RUN mode. Bits 08 through 15 are the Error flags, which
are ON when an error has occurred in the PC Link Unit. The following table
shows bit assignments for Single-Level and Multilevel PC Link Systems.
Single-level PC Link Systems
Flag type
Bit no.
SR 247
SR 248
SR 249
SR 250
Run flags
00
Unit #24
Unit #16
Unit #8
Unit #0
01
Unit #25
Unit #17
Unit #9
Unit #1
02
Unit #26
Unit #18
Unit #10
Unit #2
03
Unit #27
Unit #19
Unit #11
Unit #3
04
Unit #28
Unit #20
Unit #12
Unit #4
05
Unit #29
Unit #21
Unit #13
Unit #5
06
Unit #30
Unit #22
Unit #14
Unit #6
07
Unit #31
Unit #23
Unit #15
Unit #7
Error flags
08
Unit #24
Unit #16
Unit #8
Unit #0
09
Unit #25
Unit #17
Unit #9
Unit #1
10
Unit #26
Unit #18
Unit #10
Unit #2
11
Unit #27
Unit #19
Unit #11
Unit #3
12
Unit #28
Unit #20
Unit #12
Unit #4
13
Unit #29
Unit #21
Unit #13
Unit #5
14
Unit #30
Unit #22
Unit #14
Unit #6
15
Unit #31
Unit #23
Unit #15
Unit #7
PC Link Unit Error and Run
Flags
SR Area
Section 3-4