Integrated System Solutions for Industrial Weighing and ...€¦ · Integrated System Solutions for Industrial Weighing and Process Control 025 Measurement Systems ... eccentric/unbalanced

Integrated System Solutions forIndustrial Weighing and Process Control

025

MeasurementSystems

Internationalwww.msiscales.com

“We weigh quality first”

PUB.359-04-08 Printed in U.S.A.© 2008 by Measurement Systems International, Inc.CellScale® is a registered trademark of Measurement Systems International, Inc.

Specifications subject to change without notice.

Container Crane Load Monitoring System Retrofit

MSI-9000 CellScale with optional4-20mA Outputs for PLC Interface

in Machine HouseLoad Sensors at

the Boom Tip

ApplicationThe maintenance manager at a majorshipping port wanted to retrofit the loadmonitoring systems on their existingcontainer cranes. The OEM equipment wasnot functioning properly and there was noservice/support available. Simplicity andreliability were the key desired attributesalong with local service and support.

SolutionA variety of strain gage sensor designs andmultiple sensor locations can be utilized tomonitor the loads on container cranes.Typical sensor designs include load pinsto measure the load displaced on sheavesor wire rope dead-ends, compression loadcells under sheave assemblies, and clamp-on wire rope load sensors. MSI designsand/or provides application specific sensorsthat accurately measure the load.

In this case, load sensors were installed onthe boom tip of the container crane to sensethe load through the sheave. The load celloutputs were hardwired to a non-RF, MSI-9000 CellScale that was mounted in themachine house. Optional 4-20mA outputson the CellScale were utilized to interfacewith the container crane’s PLC controlsystem, and the standard MSI-9000CellScale set points were programmed totrip safety interlocks for eccentric /unbalanced loads, overload and slack lineconditions.

Features and BenefitsThe CellScale easily integrated with theexisting control system in the machinehouse. Using the set point relay outputs onthe CellScale to trip the safety interlocksprovided a quicker reaction time thatminimized potential damage and improved

crane safety. This simple installation provedvery reliable for the port. MSI’s AuthorizedDistribution Network provided local serviceand support.

An alternate solution is to use the wirelessRF communication from the CellScale(mounted on the boom tip adjacent to theload cells) to a receiving modem in themachine house. Optional 4-20mA and setpoint outputs from the RF modem can bewired to the crane control system in thesame manner as the non-RF solution. Thekey benefit of wireless communication isthe freeing of conductors in the festoon.

Contact MSI today for more informationon CellScale Network Solutions and/or toarrange an application review andproposal.

Other possible loadsensor locations

Trolley

14240 Interurban Avenue South, STE 200Seattle, Washington 98168-4661 U.S.A.Phone: 206-433-0199 • Fax: 206-244-8470Web: www.msiscales.com • Email: info@msiscales.com

Integrated System Solutions for Industrial Weighing and Process ControlMeasurement Systems International

MADE IN THE

USA

MADE IN THE

USA

Application ObjectiveThe maintenance manager at a major shipping port wanted to retrofit the load monitoring systems on their existing container cranes. The OEM equipment was not functioning properly and there was no service/support available. Simplicity and reliability were the key desired attributes along with local service and support.

SolutionA variety of strain gage sensor designs and multiple sensor locations can be utilized to monitor the loads on container cranes. Typical sensor designs include load pins to measure the load displaced on sheaves or wire rope dead-ends, compression load cells under sheave assemblies, and clamp-on wire rope load sensors. MSI designs and/or provides application specific sensors that accurately measure the load.

In this case, load sensors were installed on the boom tip of the container crane to sense the load through the sheave. The load cell outputs were hardwired to a non-RF MSI-9000 CellScale that was mounted in the machine house. Optional 4-20mA outputs on the CellScale were utilized to interface with the container crane’s PLC control system, and the standard MSI-9000 CellScale set points were programmed to trip safety interlocks for eccentric/unbalanced loads, overload and slack line conditions.

Features and BenefitsThe CellScale easily integrated with the existing control system in the machine house. Using the set point relay outputs on the CellScale to trip the safety interlocks provided a quicker reaction time that minimized

potential damage and improved crane safety. This simple installation proved very reliable for the port. MSI’s Authorized Distribution Network provided local service and support.

An alternate solution is to use the wireless RF communication from the CellScale (mounted on the boom tip adjacent to the load cells) to a receiving modem in the machine house. Optional 4-20mA and set point outputs from the RF modem can be wired to the crane control system in the same manner as the non-RF solution. The key benefit of wireless communication is the freeing of conductors in the festoon.

Contact MSI today for more information on CellScale network solutions and/or to arrange an application review and proposal.

14240 Interurban Avenue South, STE 200, Seattle, Washington 98168-4661 USATEL: 206-433-0199 • FAX: 206-244-8470 • EMAIL: info@msiscales.com www.msiscales.com

© 2013 by Measurement Systems International, Inc PN 154297 5/13Specifications subject to change without notice. Printed in USA

MSI(359-04-08)_ Application.indd 1 5/22/2013 10:58:41 AM