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8 Protective Operations
47
Inverter Fault Notification
If a fault is detected in the Inverter, the SI-T/V7 stores the alarm or warning code in the
MECHATROLINK-II ALARM command and simultaneously turns ON the relevant bit in
the STATUS field.
The following table shows the alarm codes for SI-T/V7 notification if a fault is detected in
the Inverter.
Table 10 Inverter Alarm Codes
ALARM
Digital Operator
Display
Description
Remarks
02H
UV1
Main circuit undervoltage
03H
UV2
Control power supply undervoltage
06H
GF
Ground fault
5.5/7.5 kW only
07H
OC
Overcurrent
08H
OV
Overvoltage
09H
OH
Inverter overheat
0BH
OL1
Motor overload
0CH
OL2
Inverter overload
0DH
OL3
Overtorque 1
10H
RH
Braking resistor overheat
5.5/7.5 kW only
11H
EF3
External fault 3
12H
EF4
External fault 4
13H
EF5
External fault 5
14H
EF6
External fault 6
15H
EF7
External fault 7
1BH
PF
Input open phase
1CH
LF
Output open phase
1EH
OPR
Digital Operator connection fault
21H
CE
MEMOBUS transmission fault
E6H
BUS
Optional transmission fault
E5H
E5
SI-T WDT fault
27H
EF0
External fault
29H
UL3
Undertorque detection 1
50H
STP
Emergency stop
51H
EF1
External fault 1
52H
EF2
External fault 2
84H
CPF04
EEPROM fault
85H
CPF05
CPU internal A/D fault
8CH
CPF07
Digital Operator control circuit fault
93H
CPF22
Communications optional model code fault
94H
CPF23
Communications optional mutual-diagnostic
fault