Mitsubishi MELSEC-A Series Reference Manual page 263

9. PROGRAMMING
Device
Name
Number
D9220
D9221
Local station
parameter
mismatched or
remote I/O station
D9222
input/output
allocation error
D9223
Data
• Stores the numbers of the stations at which a link parameter error sent
Stores the status of
from the master station is detected by another local or remote I/O station.
No.1 to No.16
Stores the status of
No.17 to No.32
Stores the status of
• If a local station goes down, data before the failure will be held.
No.33 to No.48
When contents of D9224 to D9227 and D9228 to D9231 are ORed and the
relevant bit is "0", the corresponding bit in the above special registers is
enabled.
• Even If the host station (master station) goes down, the data before the
failure will be also held.
Stores the status of
• Example:When local station No. 5 is set as a remote I/O station, "1" is set
No.49 to No.64
for 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".
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Description
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