152 ACS 400 User’s Manual
Remote Control
When the ACS 400 is in remote control (REM), the commands are given primarily through digital
and analog inputs, although commands can also be given through the control panel or serial
communication.
Parameter 1102
EXT1/EXT2 SELECT selects between the two external control locations EXT1 and
EXT2.
For
EXT1, the source of the Start/Stop/Direction commands is defined by parameter 1001 EXT1
COMMANDS, and the reference source is defined by parameter 1103 EXT REF1 SELECT. External
reference 1 is always a frequency reference.
For
EXT2, the source of the Start/Stop/Direction commands is defined by parameter 1002 EXT2
COMMANDS, and the reference source is defined by parameter 1106 EXT REF2 SELECT. External
reference 2 can be a frequency reference, or a process reference, depending on the application
macro selected.
In remote control, constant speed operation can be programmed by parameter 1201
CONST SPEED
SEL. Digital inputs can be used to select between the external frequency reference and seven
configurable constant speeds (1202
CONST SPEED 1... 1208 CONST SPEED 7).
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