External Control - ABB ACS800 Firmware Manual

External control

When the drive is in external control, the commands are given through standard I/O
terminals (digital and analogue inputs), optional I/O extension modules and/or the
fieldbus interface. In addition, it is also possible to set the control panel as the source
for the external control.
External control is indicated by a blank on the panel display or with an R in those
special cases when the panel is defined as a source for the external control.
You can connect the control signals to two external control locations, EXT1 or EXT2.
Depending on the selection, either one is active at a time. This function operates on
a 20 ms time level.
The figure below illustrates the use of the external control locations.
10.01 EXT1 STRT/STP/DIR
11.03 EXT REF1 SELECT
10.02 EXT2 STRT/STP/DIR
11.06 EXT REF2 SELECT
1 ->1242 rpm
External control through the Input/
Output terminals, or through the
fieldbus interfaces
EXT1
Stand-alone mode
Homing
EXT2
Master/Follower
Synchro control
I 1 R ->1242 rpm
External control by control panel
CH2
I
11.02 EXT1/EXT2 SELECT
Program features
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