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Controlling the ACS 400V
The ACS400V can be used from external or local control locations.
External control possibilities
1. C ontrol from I/O: Depending on the I/O connections ACS 400V can be used in alternative operation
modes. These modes, which are explained later in more detail, are designed to meet the requirements
of several HVAC applications:
•
Speed Control via External Control Signal 0-10 V, see page 12
•
Start / Stop with 1 Constant Speed, see page 13
•
Start / Stop with 2 Constant Speeds, see page 14
•
PID Control with 1 Setpoint, see page 15
•
PID Control with 2 Setpoints, see page 16
2. C ontrol via Fieldbus: Modbus protocol is as default fieldbus in ACS 400V. In order to use other
fieldbuses an external fieldbus module and an ACS 400 DDCS adapter must be used, both are
available as options. N2 fieldbus is also available as embedded fieldbus option for ACS 400V.
Local control possibilities
1. Control from control panel: ACS 400V can be directly controlled from control panel without making
any connections to the ACS 400V I/O. In this case motor starts and stops from control panel's START/
STOP button and required speed (Hz) is set with control panel.
2. Control with PC-tool DriveWindow Light: For set-up and control purposes the PC-tool DriveWindow
Light is also available as an option. For using this tool ACS 400V has to be equipped with an optional
ACS 140 RS 485/232 adapter.
Contact your local ABB supplier for more information on options.
External control
Modbus fieldbus
Optional fieldbus
Figure 4 ACS 400V control locations.
10
X3
X1
I/O
Optional
DDCS
Module
Local control
Control Panel ACS-PAN-A
X2 Panel Port "Modified RS232"
ACS 140 RS485/232
RS-232
DriveWindow Light
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