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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
0 1
Alarm Warning Most recent alarm code
1 1
Warning Alarm Most recent alarm code
1 1
Warning Warning Warning with the smaller warning code
1 0
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.