ABB ACS320 User Manual

298 Fieldbus control
 Actual value scaling
The scaling of actual values can be protocol dependent. In general, for Actual values,
scale the feedback integer using the parameter’s resolution. (See section Parameter
listing for parameter resolutions.) For example:
Where parameters are in percent, section Parameter listing specifies what parameter
corresponds to 100%. In such cases, to convert from percent to engineering units,
multiply by the value of the parameter that defines 100% and divide by 100%. For
example:
1. Assuming, for the sake of this example, that the Actual value uses parameter 9908 MOTOR NOM SPEED
as the 100% reference, and that 9908 = 1800 rpm.
2. Assuming, for the sake of this example, that the Actual value uses parameter 9907 MOTOR NOM FREQ as
the 100% reference, and that 9907 = 6.00 Hz.
Although Actual value scaling could differ from the above for the N2 and FLN
protocols, it currently does not. To confirm, see the following sections, as appropriate:
• N2 analog input objects in the N2 protocol technical data section.
• Scaling drive feedback values in the FLN protocol technical data section.
Scaling does not apply for the BACnet protocol.
Feedback
Integer
Parameter
Resolution
(Feedback Integer) * (Parameter Resolution) = Scaled Value
1 0.1 mA 1 * 0.1 mA = 0.1 mA
10 0.1% 10 * 0.1% = 1%
Feedback
Integer
Parameter
Resolution
Value of the
Parameter that
defines 100%
(Feedback Integer) * (Parameter Resolution)
* (Value of 100% Ref.) / 100% = Scaled Value
10 0.1% 1800 rpm
1
10 * 0.1% * 1800 RPM / 100% = 18 rpm
100 0.1% 600 Hz
2
100 * 0.1% * 600 Hz / 100% = 60 Hz

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%)

Summary

Safety

Safety in installation and maintenance

General safety rules for drive, motor cable, and motor installation and maintenance.

Electrical safety

Critical electrical safety instructions for qualified electricians, including precautions against electric shock.

General safety

General safety guidelines for installation, start-up, and operation, including warnings about ignoring instructions.

Planning the electrical installation

Implementing the AC power line connection

Specifies requirements for connecting the drive to the AC power line, including leakage current considerations.

Selecting the supply disconnecting device (disconnecting means)

Details the types of disconnecting devices required for different regions and safety standards.

Selecting the power cables

Electrical installation

Checking the insulation of the assembly

Instructions for checking the insulation of the drive, input power cable, and motor/motor cable to ensure safety.

Connecting the power cables

Provides connection diagrams and procedures for safely connecting input power and motor cables, including grounding.

Connecting the control cables

Start-up

Start-up by using the Start-up assistant

Guides users through the step-by-step process of using the Start-up assistant for initial drive configuration.

Start-up by changing the parameters individually

Application macros

Selecting an application macro

HVAC default

Program features

Start-up assistant

Explains the function of the Start-up assistant in guiding users through initial drive configuration and data entry.

Actual signals and parameters

Group 99: Start-up data

Fieldbus control

System overview

Mechanical and electrical installation – EFB

Serial communication selection

Fault tracing

Alarm and fault indications

Explains how alarms and faults are indicated via LEDs and panel messages, and how to identify causes.

How to reset

Details the methods for resetting faults, including keypad, digital input, fieldbus, or power cycling.

Alarm messages generated by the drive

Lists common alarm messages, their causes, and recommended troubleshooting steps for quick resolution.

Fault messages generated by the drive

Provides a comprehensive list of drive faults, their potential causes, and corrective actions for effective troubleshooting.

Maintenance and hardware diagnostics

Maintenance intervals

Cooling fan

Technical data

Ratings

Provides detailed electrical and mechanical ratings for various ACS320 drive types, including input/output currents and frame sizes.

Sizing

Guides users on how to size the drive based on motor current and power, considering ambient temperature and altitude derating.

Fuses and alternate short-circuit protection

Specifies fuse requirements and alternative manual motor protectors for branch circuit protection, ensuring safe operation.