YASKAWA MECHATROLINK-II SI-T3 Technical Manual page 31

Alarm Processing
SI-T3 Communications Fault Detection
The following tables show the communications faults detected by the SI-T3 and the conditions in which they can be
detected.
Communications Phase
Phase 1
Phase 2
Phase 3
ALARM
96 MECHATROLINK-II communications fault warning
E5 MECHATROLINK-II WDT Error
E6 MECHATROLINK-II communications fault
Fault
Communications failure
Transmission cycle fault
Watchdog timer error
Other Faults
The following table shows other faults that can be detected by the SI-T3. If a warning occurs, operation will follow the
previous command.
ALARM
94 Data setting warning
95 Command warning
EC WDC fault with drive
Drive access permission fault
ED
(Access not possible 10 consecutive times)
EE Drive monitor timer over (1 s elapsed)
<1> If the ERR indicator is not lit or flashing, any commands that are received will be ignored.
YASKAWA ELECTRIC SIEP C730600 50A YASKAWA AC Drive-Option Card MECHATROLINK-II Technical Manual
Table 22 Reception Failures in Each Phase
First
−
96
96
Table 23 Alarm Code (MECHATROLINK-II Response ALARM Value)
Description
Transmission LSI detected a data reception failure.
A timing fault of a synchronous frame in a transmission cycle was detected.
A WDT count fault in a synchronous frame was detected.
Table 25 Other fault detected by SI-T3
Description
Reception Failure
Second (Consecutive)
−
E6
E6
Table 24 Fault Types
Description
Fault Type
Communications warning
Communications warning
Communications alarm
Communications alarm
Communications alarm
9 Troubleshooting
Transmission cycle
Fault
−
E6
E6
Fault Type
Communications warning
Communications alarm
Communications alarm
Operation when Fault Occurs
Received commands are ignored.
Received commands are ignored.
Waits for power supply to be reset.
Waits for power supply to be reset.
Waits for power supply to be reset.
Received commands are ignored.
<1>
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