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Allocated Words in the DM Area Section 4-4
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• Bits corresponding to nodes that are not registered in the data link table
are always OFF.
• When a corresponding node is not connected, or an area allocation error
occurs, the corresponding bit is always OFF.
4-4 Allocated Words in the DM Area
The allocated DM Area words contain the status of the network to which the
FL-net Unit is connected and information on connected nodes. All area infor-
mation is cleared to 0 when the power is turned ON or the FL-net Unit is
restarted.
Data is stored from the beginning word in the area for each Unit, according to
the offset positions shown in the following table.
Beginning word m can be calculated by means of the following equation.
Beginning word m = (100 x unit number)
15
8 7 0
m
to
m+63
m+64
m+65
m+66
m+67
m+68
m+69
m+70
m+71
m+72
m+73
m+74
m+75
m+76
m+77
m+78
m+79
m+80
to
m+99
Data direction
FL-net Unit to CPU Unit
Node status
Bit
Offset
Number of cyclic transmission receive errors
Number of message transmission resend overflow errors
Number of message transmission receive errors
Number of ACK errors
Number of self removals
Number of removals due to skips
Total number of send errors
Total number of receive errors
(Not used.)