Mitsubishi MELSEC-A Series Reference Manual page 101

5. SPECIFICATIONS
(2) Events checked by local stations
(a) Data communication status with the master station
• Checks if cyclic communication is executed normally.(M9246)
• Checks if cyclic communication is executed normally from the master station
for the second tier when the host station is a local station for the third tier.
(M9247)
• Checks if the link parameters are received from the master station. (M9250)
• Checks if the host station can communicate data. (M9251)
(b) Data communication status with other stations
• Check a faulty local station other than the host station. (D9252 to D9255)
• The operation status of local stations other than the host station. (RUN/STEP-
RUN or STOP/PAUSE)
(c) Number of receive errors
• The accumulated number of receive error occurrences. (D9245)
(d) Link card hardware error (M9211)
(e) Mode setting switch setting status in the link card (M9240)
(f) Data link status
• Forward loop error (M9241)
• Reverse loop error (M9242)
• Loopback in the host station (M9243)
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