Mitsubishi MELSEC-A Series Reference Manual page 268

9. PROGRAMMING
Device
Name
Number
D9212
Local station
operating status
D9213
D9216
Local station error
detection status
D9217
D9220
Local station
parameter
mismatched or
remote I/O station
input/output
allocation
error
D9221
Table 9.6 List of MELSECNET/B special link registers (Continued)
Data
Stores the status of
No.1 to No.16
Stores the status of
No.17 to No.31
Stores the status of
No.1 to No.16
Stores the status of
No.17 to No.31
Stores the status of
No.1 to No.16
Stores the status of
No.17 to No.31
• Stores the station No. of all local stations that are in a STOP or
PAUSE status.
• When the status of a local station changes to STOP or PAUSE,
the corresponding bit is set to "1".
Example: When the operation status of No. 7 changes to the STOP
status, "1" is set to bit 6 of D9212. When D9212 is
monitored, its value is "64 (40
• Stores the numbers of the station that detect the occurrence of an
error at another station.
• When a normally operating local station detects an error at
another local station, the bit corresponding to the normally
operating station is set to "1". The bit status of remote I/O station
always remains "0".
Example: When No. 5 detects that No. 4 is faulty, "1" is set to bit 4
of D9216. When D9216 is monitored, its value is "16
(10 )".
H
• When the faulty station recovers normal operating status or when
the loop line is switched so that the data link returns to normal
operating status, the corresponding bit is automatically reset to
"0".
• Stores the numbers of the stations at which a link parameter error
sent from the master station is detected by another local or
remote I/O station.
Example: When local station No. 5 is set as a remote I/O station in
the link parameter settings "1" is set to bit 4 of D9220.
When D9220 is monitored, its value is "16 (10
• When the link parameter settings is corrected and the status of
the master station is switched from STOP to RUN, the bit is
automatically reset to "0".
9 - 22
Description
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H
H
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