Local Control Vs. External Control; Local Control - ABB ACS850 Firmware Manual

26 Control locations and operating modes

Local control vs. external control

The drive has two main control locations: external and local. The control location is
selected with the LOC/REM key on the control panel or with the PC tool (Take/
Release button).

Local control

Control panel or PC tool
(DriveStudio/SPC)
(optional)
1) Extra inputs/outputs can be added by installing optional I/O extension modules (FIO-xx) in
drive Slot 1/2.
2) Encoder or resolver interface module (FEN-xx) installed in drive Slot 1/2
3) Two encoder/resolver interface modules of the same type are not allowed.
Local control
The control commands are given from the control panel keypad or from a PC
equipped with DriveStudio and Solution Program Composer (SPC) when the drive is
in local control. Speed and torque control modes are available for local control.
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 disabled by parameter
The user can select by a parameter
control panel or PC tool communication break.
ACS850
2) 3)
M
3~
MOTOR
Encoder
(30.03 Local ctrl
External control
1) 3)
I/O
(= Programmable
Logic Controller)
Drive-to-drive link
Fieldbus adapter
Fxxx in Slot 3
16.01 Local
loss) how the drive reacts to a
PLC
lock.