ABB ACS880-34 Guia De Instalacion página 20

20 EN – Quick installation and start-up guide
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
EN
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
DA
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
DE
defaulted to 20 and selectable in parameter 35.57.
ES
Use the information key (
group 35 parameters. You must set the drive overload parameters correctly, or motor
FI
damage could occur.
FR
Fieldbus communication
￭
IT
To configure the embedded fieldbus communication for Modbus RTU, you must set
at least these parameters:
NL
Parameter
PL
20.01 Ext1 commands
PT
22.11 Speed ref1 source
SV
26.11 Torque ref1 source
TR
28.11 Frequency ref1
ZH
source
58.01 Protocol enable
58.03 Node address
58.04 Baud rate
58.05 Parity
58.06 Communication
control
Other parameters related to the fieldbus configuration:
58.14 Communication
loss action
?
) on the drive control panel for more information on setting
Setting Description
Embedded fieldbus Selects fieldbus as the source for the start and stop
commands when EXT1 is selected as the active control
location.
EFB ref1 Selects a reference received through the embedded
fieldbus interface as speed reference 1.
EFB ref1 Selects a reference received through the embedded
fieldbus interface as torque reference 1.
EFB ref1 Selects a reference received through the embedded
fieldbus interface as frequency reference 1.
Modbus RTU Initializes embedded fieldbus communication.
1 (default) Node address. There must be no two nodes with the
same node address on-line.
19.2 kbps (default) Defines the communication speed of the link. Use the
same setting as in the master station.
8 EVEN 1 (default) Selects the parity and stop bit setting. Use the same
setting as in the master station.
Refresh settings Validates any changed EFB configuration settings. Use
this after changing any parameters in group 58.
58.17 Transmit delay 58.28 EFB act1 type 58.34 Word order