Program features 87
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 by
setting parameters
…
. 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
). The source of reference is selectable for each operating mode
separately.
Communication fail functionality
The communication fail functionality ensures continuous process without
interruptions. If there is a communication loss, the drive automatically changes the
control location from EXT1 to EXT2. This enables process to be controlled, for
example, with the drive PID controller. When the original control location recovers,
the drive automatically switches control back to the communication network (EXT1).
Block diagram: EXT1/EXT2 selection for speed control
Default =
Input 1
Input 2
Input 3
Input 1
Input 2
Input 3
Function
or a math.
function of
Input 1
Input 2
Input 3
Input 1
Input 2
Input 3
Function
or a math.
function of
Select
ACS580 FW.book Page 87 Wednesday, September 21, 2016 9:48 PM
