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Motor overload protection
The factory motor overload protection is not enabled by default. Motor thermal overload protection can use motor
temperature sensors, can be estimated using a motor model defined by parameters, or can use measured motor current
and motor class curves. To enable protection using motor model parameters or measurement sensors, set parameter 35.11
and subsequent parameters through 35.55. To enable motor class curves, set parameter 35.56.
Motor overload class is defaulted to 20 and selectable in parameter 35.57.
Use the information key ( ) on the drive control panel for more information on setting group 35 parameters. You must set
the drive overload parameters correctly, or motor damage can occur.
Fieldbus communication
To configure the embedded fieldbus communication for Modbus RTU you must set at least these parameters:
Other parameters related to the fieldbus configuration:
Warnings and faults
13.
14.
Parameter
Setting
Description
20.01 Ext1 commands
Embedded
fieldbus
Selects fieldbus as the source for the start and stop commands when
EXT1 is selected as the active control location.
22.11 Speed ref1 source
EFB ref1
Selects a reference received through the embedded fieldbus interface
as speed reference 1.
26.11 Torque ref1 source
EFB ref1
Selects a reference received through the embedded fieldbus interface
as torque reference 1.
28.11 Frequency ref1 source
EFB ref1
Selects a reference received through the embedded fieldbus interface
as frequency reference 1.
58.01 Protocol enable
Modbus RTU
Initializes embedded fieldbus communication.
58.03 Node address
1 (default)
Node address. There must be no two nodes with the same node
address on-line.
58.04 Baud rate
19.2 kbps (default) Defines the communication speed of the link. Use the same setting as
in the master station.
58.05 Parity
8 EVEN 1 (default) Selects the parity and stop bit setting. Use the same setting as in the
master station.
58.06 Communication control Refresh settings
Validates any changed EFB configuration settings. Use this after
changing any parameters in group 58.
58.14 Communication loss
action
58.17 Transmit delay
58.28 EFB act1 type
58.34 Word order
58.15 Communication loss
mode
58.25 Control profile
58.31 EFB act1 transparent
source
58.101 Data I/O 1
…
58.124 Data I/O 24
58.16 Communication loss
time
58.26 EFB ref1 type
58.33 Addressing mode
Warning
Fault Aux. code
Description
A2A1
2281
Current calibration
Warning: Current calibration is done at the next start.
Fault: Output phase current measurement fault.
-
2310
Overcurrent
The output current is more than the internal limit. This can also be caused by
an earth fault or phase loss.
A2B3
2330
Earth leakage
A load unbalance that is typically caused by an earth fault in the motor or the
motor cable.
A2B4
2340
Short circuit
There is a short-circuit in the motor or the motor cable.
-
3130
Input phase loss
The intermediate DC circuit voltage oscillates due to missing input power
line phase.
-
3181
Wiring or earth fault
Incorrect input and motor cable connection.
A3A1
3210
DC link overvoltage
Intermediate DC circuit voltage is too high.
A3A2
3220
DC link undervoltage
Intermediate DC circuit voltage is too low.
-
3381
Output phase loss
All three phases are not connected to the motor.
-
5090
STO hardware failure
STO hardware diagnostics has detected hardware failure. Contact ABB.
A5A0
5091
Safe torque off
The Safe torque off (STO) function is active.
A7CE
6681
EFB comm loss
Break in embedded fieldbus communication.
A7C1
7510
FBA A communication
Communication lost between drive (or PLC) and fieldbus adapter.
AF80
7580
INU-LSU comm loss
DDCS communication between converters is lost.
-
7583
Line side unit faulted
The supply unit (or other converter) connected to the inverter unit has
generated a fault.
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