￭ Motor overload protection
The factory motor overload protection is not enabled by default. Motor thermal
overload protection can be measured using motor temperature devices, 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 devices 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 could occur.
￭ Fieldbus communication
To configure the embedded fieldbus communication for Modbus RTU, you must set
at least these parameters:
DescriptionSettingParameter
Selects fieldbus as the source for the start and stop
commands when EXT1 is selected as the active control
location.
Embedded fieldbus20.01 Ext1 commands
Selects a reference received through the embedded
fieldbus interface as speed reference 1.
EFB ref122.11 Speed ref1 source
Selects a reference received through the embedded
fieldbus interface as torque reference 1.
EFB ref126.11 Torque ref1 source
Selects a reference received through the embedded
fieldbus interface as frequency reference 1.
EFB ref128.11 Frequency ref1
source
Initializes embedded fieldbus communication.Modbus RTU58.01 Protocol enable
Node address. There must be no two nodes with the
same node address on-line.
1 (default)58.03 Node address
Defines the communication speed of the link. Use the
same setting as in the master station.
19.2 kbps (default)58.04 Baud rate
Selects the parity and stop bit setting. Use the same
setting as in the master station.
8 EVEN 1 (default)58.05 Parity
Validates any changed EFB configuration settings. Use
this after changing any parameters in group 58.
Refresh settings58.06 Communication
control
Other parameters related to the fieldbus configuration:
58.34 Word order58.28 EFB act1 type58.17 Transmit delay58.14 Communication
loss action
EN – Quick installation instructions 17
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