ABB ACS 600 Supplement To Firmware Manual page 20

Chapter 4 – Parameters
11.02 EXT1/EXT2
SELECT
4-2
This parameter sets the digital input used for selecting the External
control location, or fixes it to EXT1 or EXT2. The parameter determines
the active External control location for both the Start/Stop/Direction
commands and the reference.
EXT1; EXT2; DI1 ... DI6; COMM. MODULE
See ACS 600 Programming Manual . DI3 is the default setting in the
Master/Follower Macro. The selection COMM. MODULE is not used
with the Master/Follower Application macro.
The selection between EXT1 and EXT2 is illustrated in the control
connection diagrams (see Appendix A – Control Signal Connections ):
1. EXT1 is selected:
• The control commands are read from a source defined with
Parameter 10.01 STRT/STP/DIR
• The external speed reference is read from a source defined with
Parameter 11.03 EXT REF1 SELECT.
• ACS 600 is always speed controlled; window control is not possible.
2. EXT2 is selected:
• The control commands are read from a source defined with
Parameter 10.02 STRT/STP/DIR
• The external speed reference is read from a source defined with
Parameter 11.03 EXT REF1 SELECT. Note that the critical speeds
(Parameter Group 25) are not considered in speed control chain.
• The external torque reference is read from a source defined with
Parameter 11.06 EXT REF2 SELECT.
• ACS 600 is speed or torque controlled depending on the value of
Parameter 60.02 TORQUE SELECTOR which chooses the internal
torque reference: The parameter fixes it to speed controller output
(SPEED) or direct torque reference (TORQUE), or MIN, MAX or
ADD function is used to automatically switch between speed and
torque control. For more information see the description of
Parameter 60.02 TORQUE SELECTOR later in this chapter.
WARNING! The Follower should always be controlled by the Master
while the motors are coupled to each other. Do not change the control
location if this activates a control signal source other than Master:
• Do not change the External control location if Parameter 10.01,
10.02, 11.03 or 11.06 is set to a value other than COMM. MODULE.
• Do not switch to local control (do not press the
Control Panel).
If the Master and Follower are controlled with different control signals,
the drives conflict with each other.
ACS 600 Master/Follower Application Macro
LOC key on the
REM