External Control - ABB ACS580 Firmware Manual



External control

When the drive is in external control, control commands are given through
• the I/O terminals (digital and analog inputs), or optional I/O extension modules
• the fieldbus interface (via the embedded fieldbus interface or an optional fieldbus
adapter module).
Two external control locations, EXT1 and EXT2, are available. The user can select
the sources of the start and stop commands separately for each location in the
Primary settings menu (Menu - Primary settings - Start, stop, reference) or setting
parameters 20.01...20.10. The operating mode can be selected separately for each
location, which enables quick switching between different operating modes, for
example speed and torque control. Selection between EXT1 and EXT2 is done via
any binary source such as a digital input or fieldbus control word (Menu - Primary
settings - Start, stop, reference - Secondary control location or parameter
Ext1/Ext2 selection). The source of reference is selectable for each operating mode
separately.
Block diagram: Run enable source for EXT1
The figure below shows the parameters that select the interface for run enable for
external control location EXT1.
0
1
DI1
DI6
Embedded fieldbus
Fieldbus adapter
Timed function
Supervision
A bit in a parameter
Settings
• Menu - Primary settings - Start, stop, reference - Secondary control
location; Menu - Primary settings - Start, stop, reference
• Parameters 19.11 Ext1/Ext2 selection
Motor potentiometer
The motor potentiometer is, in effect, a counter whose value can be adjusted up and
down using two digital signals selected by parameters
source and 22.74 Motor potentiometer down
Not selected
Selected
DI1
DI6
EFB MCW bit 3
FBA A MCW bit 3
Timed function 1...3
Supervision 1...3
Other [bit]
(page 173); 20.01...20.10
22.73 Motor potentiometer up
source.
Program features 87
19.11
Select
EXT1
Run enable
20.12
(page 174).