11
Motor overload protection
The motor thermal overload protection can use motor temperature devices or can be estimated using a motor model
defined by parameters. The motor thermal overload protection is set to motor current and motor class curves as default. To
enable protection using motor model parameters or measurement devices, set parameter
35.11
and subsequent
parameters through
35.55.
To adjust motor class curves (default is class 20), change parameters
35.56
and
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 could 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
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.
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
…
58.114 Data I/O 14
58.16 Communication loss
time
58.26 EFB ref1 type
58.33 Addressing mode
Warning
Fault Aux. code
Description
-
2281
Current calibration
Fault: Output phase current measurement fault.
A2B1
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.
3E00
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.
A7AB
-
Extension I/O
configuration failure
The I/O extension module types and locations specified by parameters do
not match the detected configuration.
AFF6
-
Identification run
The motor ID run occurs at the next start.
-
FA81
Safe torque off 1 loss
The Safe torque off circuit 1 is broken.
-
FA82
Safe torque off 2 loss
The Safe torque off circuit 2 is broken.
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