Bulletin: SVB-120

Date Issued: July 14, 2006

Category: Design Improvement

Subject: Operating System Modification

Machine Models: Bundle Breakers¨ delivered since Sept. 2002

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Problem

Recommended Action

Modification Procedure

Problem:

A customer reported that their Bundle Breaker ^¨ overheated and damaged the hydraulic pump while the machine was left unattended and in automatic operation. This unit had been in service since 2002.

The Bundle Breaker ^¨ control system is intended to shut down the machine as a protective measure if 999 continuous seconds of inactivity have been experienced while operating in the automatic mode. However, on-site investigation by Alliance revealed that the automatic shutdown feature in the delivered control program logic did not function as intended and led to overheating of the hydraulic system.

In response to this problem an Alliance technician modified the control program and confirmed proper operation of the automatic shutdown feature. This control system logic change has also been accomplished for all new and future production Bundle Breaker ^¨ units.

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Recommended action:

Alliance recommends that Bundle Breaker ^¨ customers perform the following modification within 30 days after receipt of this service bulletin.

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Modification Procedure:

If you need additional assistance to perform this modification or have any questions, please call Mr. Gary Kneale of Alliance Field Service at (509) 842-5134 for further information.

1. Upload the Bundle Breaker ^¨ operating program in the machine PLC to a laptop.  Using RS Logix open the program for editing.

2. Refer to Figure 1 which has been extracted from Ladder 3 in the Operating Program portion of the Maintenance Manual documentation. Make the following control system logic changes (as highlighted) –

• On Rung 9 delete the following 2 contacts

  • Separation Cylinder Retract O:6/3

  • Compression Bridge Up O:6/5

• Delete Rung 10 in its entirety.

Figure 2 shows the corrected configuration for Rung 9.

3. Save the edited program. Download the program back into the Bundle Breaker ^¨ and save to EEPROM.

4. Check for normal Bundle Breaker ^¨ operation.

5. In Automatic operation verify that the Bundle Breaker ^¨ shuts down after approx 16.5 minutes of inactivity.

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