Technical Bulletin

Programmable Controller Stepping Issues

Advisory

Date

September 1, 2003

Reference

132

Route to

Modernization Manager/Service Manager

From

MCE Technical Support Department

Equipment

All Control Systems not designed to ASME A17.2000 (B44) Code with PCA software versions between 5.23.0001 and 6.01.0002.

Description

If you are experiencing stepping problems with the above mentioned control systems it could be due to the type of the microprocessor chip on the MC-PCA-0A board. Please note that most stepping problems are related to the landing system installation. If you are experiencing stepping problems be sure to verify that the problem is not due to the landing system before changing the microprocessor.

Action

If you are experiencing the symptom described above, or if you are unsure whether a problem you are experiencing may be related to this issue, call MCE Technical Support to troubleshoot the problem. If necessary, MCE will send new microprocessor chips (one per controller to be installed on the MC-PCA-0A board). No reprogramming of parameters or settings is necessary.

Help

Should you require additional technical assistance:

• Telephone 916/463-9200
• Touch "6" for Technical Support
• Refer to the reference number above