Mitsubishi MELSEC-A Series Reference Manual page 267

9. PROGRAMMING
Device
Name
Number
D9207
D9208 Link scan time
D9209
D9210 Retry count
Table 9.6 List of MELSECNET/B special link registers (Continued)
Data
Maximum value
Minimum value
Current value
Total number stored
• Stores the time used for data link processing (link scan time) by
all of the local stations and remote I/O stations in the loop
currently being used for data link. (in 10ms unit)
• Link scan time definition:
• Stores the total number of retries conducted when a transmission
error occurs.
• Definition of retry processing:
If data is lost or becomes unreliable due to the occurrence of a
data transmission processing error, the same data is sent again.
• Counting stops if the number of retries exceeds the maximum
limit "FFFF ".
H
• Execute reset operation to clear the data to "0".
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Description