Installation Manual

MN04001003E 9 February 2006
Group 8 — Special Parameters, continued
Group 9 — Communication Parameters

The parameter may be set during operation.
Fault Codes
The NFX9000 drive has a comprehensive fault diagnostic system that includes several different alarms and fault
messages. Once a fault is detected, the corresponding protective functions will be activated. The following faults are
displayed on the AC drive digital keypad. The six most recent faults can be read on the digital keypad display by
viewing Parameter 6-07 to Parameter 6-12.
Note: Faults can be cleared by pressing the RESET key on the keypad or Input Terminal.
Common Problems and Solutions
Code Parameter Min. Max. Unit Default Note
8-13 Skip frequency 3
lower bound
0.0 400 Hz 0.0 0.0 – 400 Hz
8-14 Auto restart after
fault
0 10 0 0 – 10
8-15 AVR function 0 2 2 0: AVR function enabled
1: AVR function disabled
2: AVR function disabled with deceleration
8-16 Dynamic braking
voltage
350 450 V 380 350 – 450V
8-17 DC braking lower
bound limit
0.0 400 Hz 0.0 0.0 – 400 Hz
Code Parameter Min. Max. Unit Default Note
9-00

Communication
address
1 247 1 1 – 247
9-01

Transmission speed 0 2 1 0: Baud rate 4,800
1: Baud rate 9,600
2: Baud rate 19,200
9-02

Transmission fault
treatment
03 0 0: Warn and continue running
1: Warn and ramp to stop
2: Warn and coast to stop
3: No warning and keep running
9-03

Modbus
communication
watchdog timer
020 0 0: Disable, 1 – 20 : 1 – 20 seconds
9-04

Communication
protocol
0 8 0 ASCII mode:
0: 7,N,2
1: 7,E,1
2: 7,O,1
3: 8,N,2
4: 8,E,1
5: 8,O,1
RTU mode:
6: 8,N,2
7: 8,E,1
8: 8,O,1
Fault
Name Fault Description Corrective Action
oc Drive detects an abnormal increase
in current
1. Make sure the motor’s horsepower corresponds to the drive’s output power.
2. Check the wiring connections between the drive and motor for possible short
circuits.
Note: If there are any abnormal conditions when operating the drive after the
short circuit is removed, consult Eaton.
3. Increase the acceleration time (parameters 1-09 and 1-11).
4. Check for possible excessive loading.
ou Drive detects that DC bus voltage has
exceeded its maximum allowable
value
1. Make sure the input voltage falls within the drive’s input voltage rating
range.
2. Check for possible voltage transients.
3. Increase the deceleration time. (Bus overvoltage may also be caused by
motor regeneration.)
oH Drive’s temperature sensor detects
excessive heat
1. Ensure that the ambient temperature falls within the specified temperature
range.
2. Make sure that the ventilation holes are not obstructed.
3. Remove any foreign objects on the heat-sink and check for possible dirty
heat-sink fins.
4. Provide enough spacing for adequate ventilation.
Lu Drive detects that DC bus voltage has
fallen below its minimum value
Make sure the input voltage falls within the drive’s input voltage rating range.
oL1 Internal electronic overload trip 1. Check for a possible motor overload.
2. Check electronic thermal overload setting.
3. Increase motor capacity.
4. Reduce the current level so the drive’s output current does not exceed the
value set by the Motor Rated Current, parameter 7-00.
EF External terminal EF-GND goes from
OFF to ON
When the EF-GND is closed, the output will be turned off (under N.O.E.F.)
MN04001003E.fm Page 9 Tuesday, March 21, 2006 8:26 AM