Scanner problems, Power supply problems, Scanner problems power supply problems – Rockwell Automation 2090 Ultra3000 Servo Drives Integration Manual User Manual

Page 111

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Publication 2098-IN005C-EN-P — March 2008

Troubleshooting Your Ultra3000 Servo Drive

111

Scanner Problems

If using a scanner, check the scan list, data rate, and addresses of
devices. Verify series and revision of the scanner is the latest. If the
scanner is bus-off, recycle the 24V supply and then reset the scanner.

If the scanner goes bus-off again, the problem is some combination of
these issues.

Defective node device

Incorrect node data rate

Bad network topology

Faulty wiring

Faulty scanner

Faulty power supply

Bad grounding

Electrical noise

Power Supply Problems

If a single power supply is used, add up the current requirements of
all devices drawing power from the network. This total should be
considered the minimum current rating in selecting the power supply
used.

In addition, check these symptoms.

Length and current level in trunk and drop cables

Size and length of the cable supplying power to the trunk

Voltage measured at the middle and ends of the network

Noise in network power measured with an oscilloscope

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