Local Control Vs. External Control; Local Control - ABB ACS880 Firmware Manual

20 Control locations and operating modes

Local control vs. external control

The ACS880 has two main control locations: external and local. The control location
is selected with the Loc/Rem key on the control panel or in the PC tool.

Local control

Control panel or Drive
composer PC tool (optional)
Encoder
1) Extra inputs/outputs can be added by installing optional I/O extension modules (FIO-xx) in
drive slots.
2) Encoder or resolver interface module(s) (FEN-xx) installed in drive slots.

Local control
The control commands are given from the control panel keypad or from a PC
equipped with Drive composer when the drive is set to local control. Speed and
torque control modes are available for local control; frequency mode is available
when scalar motor control mode is used (see parameter
Local control is mainly used during commissioning and maintenance. The control
panel always overrides the external control signal sources when used in local control.
Changing the control location to local can be prevented by parameter
control disable.
The user can select by a parameter
reacts to a control panel or PC tool communication break. (The parameter has no
effect in external control.)
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ACS880
2)
I/O
Fieldbus adapter (Fxxx)
or DDCS communication
module
Embedded fieldbus
interface (EFB) or
master/follower link
M
3~
MOTOR
(49.05 Communication loss
External control
1)
Control panel
19.16 Local control
19.17 Local
action) how the drive
PLC
mode).