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FINS Commands for SYSMAC LINK Units
6-4-7
DATA LINK STATUS READ
Command Block
Response Block
Parameters
Cyclic non-fatal errors (response): These eight bytes indicate nodes in
which non-fatal errors occurred in cyclic transmission. When a bit in the fol-
lowing matrix is ON, a non-fatal error occurred in the corresponding node.
Bit 0 of the first byte and bit 7 of the eighth byte are always OFF.
7
6
5
Bit
7
6
5
First byte
15 14 13 12 11 10 9
Second byte
23 22 21 20 19 18 17 16
Third byte
31 30 29 28 27 26 25 24
Fourth byte
39 38 37 36 35 34 33 32
Fifth byte
47 46 45 44 43 42 41 40
Sixth byte
55 54 53 52 51 50 49 48
Seventh byte
− 62 61 60 59 58 57 56
Eighth byte
Cyclic error counters (response): One of these 62 bytes is allocated to
each node to indicate how many cyclic errors occurred since startup. The first
byte is allocated to node address 1, the second to node address 2, etc. Each
number is 2-digit hexadecimal, so 00 to FF (0 to 255 decimal) errors can be
recorded for each node. If more than 255 errors occur, the number will remain
at 255.
Reads the status of the data link.
The various data link status information described here will not be refreshed
while the data link is halted.
06
03
Command
code
06
03
Command
Response
code
code
Status flags
Status flags (response): This byte contains flags providing information on
overall data link status, as follows:
7
6
5
4
3
Bit
0
0
0
4
3
2
1
0
−
4
3
2
1
8
Present
Max.
refresh time
refresh time
2
1
0
0
1: Data link table error
1: No data link table
1: Automatic link word allocation
(0: Allocation via data link tables)
1: Data link is active.
(0: Data link is halted.)
Section 6-4
31 bytes
Data link
status
117
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