ABB ACS320 User Manual

Program features 115
Critical speeds
A Critical Speeds function is available for applications where it is necessary to avoid
certain motor speeds (drive output frequencies) or speed bands (output frequency
bands) because of, for example, mechanical resonance problems. The user can
define three critical frequencies or frequency bands.
 Settings
Parameter Group 25: Critical speeds
Constant speeds
It is possible to define seven positive constant speeds. Constant speeds are selected
with digital inputs. Constant speed activation overrides the external speed reference.
Constant speed selections are ignored if
• PID reference is being followed, or
• drive is in local control mode.
This function operates on a 2 ms time level.
 Settings
Parameter Group 12: Constant speeds
Constant speed 7 (1208 CONST SPEED 7) is also used for fault functions. See
parameter group Group 30: Fault functions.

ABB ACS320 Specifications

General

Overload Capacity	150% for 60 seconds
IP Rating	IP20
Frame Size	R1 to R3
Enclosure Rating	IP20
Frequency Range	0 to 500 Hz
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overload, Short circuit, Ground fault, Overtemperature
Fieldbus Communication	Modbus RTU, PROFIBUS DP, CANopen
Communication Interfaces	RS485
Operating Temperature	-10 to +50 °C (14 to 122 °F)
Storage Temperature	-40°C to +70°C
Humidity	Less than 95% (non-condensing)
Supply Voltage	200 V to 240 V (±10%), 380 V to 480 V (±10%)
Input Voltage	200 V to 240 V (±10%), 380 V to 480 V (±10%)