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ABB ACS880 Supplement Manual
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ABB ACS880 Supplement Manual

Cavitation detection controlprogram
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ABB INDUSTRIAL DRIVES
ACS880 Cavitation detection control program
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Summary of Contents for ABB ACS880

  • Page 1 — ABB INDUSTRIAL DRIVES ACS880 Cavitation detection control program Supplement...
  • Page 3 ACS880 Cavitation detection control program Supplement Table of contents 3AXD50000639199 Rev A EFFECTIVE: 2020-10-06...

  • Page 5: Table Of Contents

    Table of contents 5 Table of contents 1 Introduction to the manual Contents of this chapter ................Applicability ..................Safety instructions ................. Target audience ..................Related manuals ................... Terms and abbreviations ................2 Program Features Contents of this chapter ................Cavitation detection overview ..............
  • Page 6 6 Table of contents Warning messages ................Fault messages ..................Further information...

  • Page 7: Introduction To The Manual

    This chapter contains general information on the manual. It also contains information on the compatibility, safety and intended audience. Applicability This document is a supplement to ACS880 Primary control program firmware manual (3AUA0000085967 [English]). This manual applicable to ACS880 Cavitation detection control program (version 8.2.1.2 or later).

  • Page 8: Related Manuals

    Drive hardware manual (varies depending on the drive type) Drive firmware manuals and guides ACS880 primary control program firmware manual 3AUA0000085967 Quick start-up guide for ACS880 drives with primary control program 3AUA0000098062 Option manuals and guides ACX-AP-x assistant control panels user’s manual 3AUA0000085685 Drive composer start-up and maintenance PC tool user’s manual...

  • Page 9: Program Features

    This chapter describes functions of the control program. Cavitation detection overview The Caviation detection control program is an IEC program loaded on ACS880 drive. The program uses the drive torque, the drive speed or a combination of these two to detect high variations of torque or speed in the pump motor.

  • Page 10: Settings And Diagnostics

    10 Program Features 1. The function measures torque samples during a user-defined sample period (88.03), and calculates: • average torque (09.02), • for each sample, the sample variation vs. the average torque, • the effective (rms) value of all sample variation values (09.01). 2.

  • Page 11: Settings And Diagnostics

    Program Features 11 variations. The disabling only takes place if the change is in effect for a certain time period. For calculating this time period, the function uses the change in speed reference, speed scaling (46.01), acceleration/deceleration times (23.12/23.13) and a time coefficient (88.06). Settings and diagnostics ￭...

  • Page 12: Normal Torque Rms Autodetection

    12 Program Features Normal torque rms autodetection ￭ Normal torque rms autodetection calculates the torque rms variation value in normal conditions. The function measures torque samples during a user-defined sample period (88.08), and calculates: • average torque (09.02), • for each sample, the sample variation value vs. average torque, •...

  • Page 13: Settings And Diagnostics

    Program Features 13 • autodetection activation (88.12), • autodetection time (88.08), • variable selection (87.08) = Speed, • average speed (09.06), • normal speed variation rms value calculated by the autodetection (88.09), • filter time for motor speed (46.11). The auto-detection calculates the normal speed variation rms value at one operation point (speed reference value).

  • Page 14: Settings And Diagnostics

    (09.04) as the speed reference source for the drive (parameter 22.11 or 22.12). Make consistent selections in parameters 22.13 and 22.14. See the diagram below and the ACS880 Primary control program firmware manual (3AUA0000085967 [English]).

  • Page 15: Settings And Diagnostics

    Program Features 15 Speed reference selection and handling Cavitation detection control program 87.05 Zero Speed 87.06 Internal Ref. Cavitation 09.04 detection FBA A Reference 03.05 Other Speed reference selection Primary control program 22.11 22.13 Ref1 22.81 … … 22.14 Other 22.83 22.12 Drive...

  • Page 16: Settings And Diagnostics

    16 Program Features external (remote) control mode of the drive, and disable it every time that user switches the drive in local control mode (operates the drive with the panel). See the block diagram below. Enable/disable Cavitation protection 86.01 control program Disable Enable 87.02...
  • Page 17 Program Features 17 • the speed reference input (87.05) connected to the Cavitation detection control program changes. • Normal torque rms autodetection (88.07), Normal speed rms autodetection (88.12) or Combination rms autodetection (88.18) is ongoing. • Mode selection parameters disable the protection function (Bit 0 is False in 87.01). See Enabling/disabling the Cavitation detection control program (page 15).
  • Page 18 18 Program Features Examples of Cavitation protection: • The program detects cavitation continuously and the pump is set to trip after 5 seconds of running at minimum speed.
  • Page 19 Program Features 19 • The drive detects cavitation occasionally and the speed goes up and down. At minimum speed, the program detects cavitation for a time that is shorter than 86.07, so the drive does not trip.

  • Page 20: Settings And Diagnostics

    20 Program Features • 86.03 Cavitation Fault/Alarm is set to Alarm and 86.10 End of Tank Detection to Enabled. The program does not increase speed after the drive has run for 3 seconds at minimum speed although cavitation continues. Settings and diagnostics ￭...

  • Page 21: Settings And Diagnostics

    Program Features 21 Note: The End of tank function does not stop the drive. You must stop it separately when the tank is completely empty. Settings and diagnostics ￭ Parameters: 86.03, 86.04, 86.07, 86.10, 86.11. Events: E100 Cavitation fault, E200 Pump not started, E201 Pump does not reach speed,...

  • Page 23: Parameters

    Parameters 23 Parameters Contents of this chapter This chapter describes the service level parameters and signals of the ACS880 Cavitation detection control program. Terms and abbreviations See ACS880 primary control program firmware manual (3AUA0000085967[English]). Parameter listing This supplement lists only the parameters that are relevant to the ACS880 Cavitation detection control program.

  • Page 24: 09 Application Signals

    24 Parameters Name/Value Description Def/FbEq16 07.24 Application version Shows the program version. 1.2.0.0 09 Application Signals ￭ Name/Value Description Def/FbEq16 Application Signals Basic signals for monitoring torque and speed calculation results and speed reference output. 09.01 Torque Variation Shows the torque variation from average torque (09.02) as a rms value.

  • Page 25: Cavitation Protection

    Parameters 25 Name/Value Description Def/FbEq16 0.00…5.00 Relation 09.05/88.09 100 = 1 86 Cavitation Protection ￭ Name/Value Description Def/FbEq16 Cavitation Protection Parameters that enable and disable the Cavitation detection control program and determine the response, when cavitation is detected. 86.01 Cavitation protection Enables the Cavitation detection control program.

  • Page 26: 87 Pump Mode And Reference Selection

    26 Parameters Name/Value Description Def/FbEq16 0.00…3200.00 s Delay 10 = 1 second 86.07 Protection Action Defines the time delay for the event selection (86.03). 5.0 seconds Delay (Fault/Alarm) 0.00…3200.00 s Delay 10 = 1 second 86.08 Speed Up Delay 10.0 seconds Defines the time before the speed increases, if the program does not detect cavitation.
  • Page 27 Parameters 27 Name/Value Description Def/FbEq16 Bit 0 Value of 87.04 Pump Mode Logic Operation. When value is true True (1), the bit enables the Cavitation detection control program. When the bit is false (0), the bit disables the program. You can control the value of the bit by parameters 87.02, 87.03 and 87.04.

  • Page 28: 88 Variable Variations Calculations

    28 Parameters Name/Value Description Def/FbEq16 87.08 Operation mode se- Selects the signal which the control program calculates and lection monitors for cavitation detection. Make sure to use consistent selection with the Cavitation trigger signal selection (86.02). Torque Torque variation rms values Speed Speed variation rms values Combination...
  • Page 29 Parameters 29 Name/Value Description Def/FbEq16 88.06 Speed Change Time Sets a coefficient that is used to calculate the time it takes for the 1.25 Coefficient drive to change the speed from a previous reference speed to new reference speed. When a change of reference is sensed by the program, the rms value calculations are stopped for this period and the sample values array is reset.
  • Page 30 30 Parameters Name/Value Description Def/FbEq16 88.14 Combination Vari- 2.00 Sets a threshold value for cavitation detection based on the ation Threshold combination of speed and torque monitoring. If the relative com- bination variation (88.16) is above the Combination variation threshold longer than the time delay (88.15), the program indicates cavitation by bit 0 of 88.17 Combination Variation Status.

  • Page 31: Fault Tracing

    Fault tracing 31 Fault tracing Contents of this chapter This section lists warning and fault messages including possible causes and corrective actions. This section contains the faults and warnings that are specific only for the ACS870 Cavitation detection control program. See ACS870 Primary control program firmware manual (3AUA0000085967 [English]) for the other warnings and faults.
  • Page 32 32 Fault tracing Fault messages Code Fault Cause What to do (hex) E100 Cavitation fault Cavitation detection function has gener- If the fault is incorrect (there is no cavita- ated a cavitation warning. All of these tion), check the parameter settings for the conditions are valid: Cavitation detection function and the re- lated event selection (alarm/fault).
  • Page 33 Product and service inquiries Address any inquiries about the product to your local ABB representative, quoting the type designation and serial number of the unit in question. A listing of ABB sales, support and service contacts can be found by navigating to www.abb.com/searchchannels.
  • Page 34 3AXD50000639199A © Copyright 2020 ABB. All rights reserved. Specifications subject to change without notice.

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