8 Protective Operations
45
8.2 Alarm Processing
SI-T Communications Fault Detection
The following tables show the communications faults detected by the SI-T and the condi-
tions in which they can be detected.
Table 6 Response Data for Consecutive Alarms and/or Warnings
Fault Detection MECHATROLINK-II Response Data Contents
Previous
Value
Most Recent
Value
Alarm STATUS
WARNG ALM
Alarm Alarm Most recent alarm code
01
Alarm Warning Most recent alarm code
11
Warning Alarm Most recent alarm code
11
Warning Warning Warning with the smaller warning code
10
Table 7 Reception Failures in Each Phase
Communications
Phase
Reception Failure Transmission cycle
First Second (Consecutive) Fault
Phase 1
−− −
Phase 2
96 E6 E6
Phase 3
96 E6 E6
Table 8 Alarm Code (MECHATROLINK-II Response ALARM Value)
ALARM Description Fault Type
96 MECHATROLINK-II communications fault warning Communications warning
E5 MECHATROLINK-II WDT fault Communications alarm
E6 MECHATROLINK-II communications fault Communications alarm
Table 9 Fault Types
Fault Description
Communications failure Transmission LSI detected a data reception failure.
Transmission cycle fault A timing fault of a synchronous frame in a transmission cycle was
detected.
Watchdog timer fault A WDT count fault in a synchronous frame was detected.
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