Rockwell-automation 1788-CNCHKR ControlNet NetChecker User Manual Manual de usuario descargar pdf (Pagina 16)

16 ControlNet NetChecker

Rockwell Automation Publication 1788-UM001B-EN-P - August 2012

Illegal Framing

Illegal Framing has the following indications.

Illegal Framing occurs if short messages or short between-message gaps have been detected.

Illegal Framing detection is dependent on the threshold setting (SW3). Generally, recurrence

decreases as the threshold is made higher. This fault is often reported along with Poor Signal

Quality.

Illegal Framing most likely indicates a high level of signal reflections on the network (see

previous section), but can also be caused by a faulty node. A faulty node can be suspected in these

scenarios:

• Only Illegal Framing is reported.

• It is not affected by the threshold setting.

• The fault is reported everywhere on the network but the bargraph shows correct signal

levels.

In this case, try to identify the node with the Node Finder. Check the Node On Line status

indicator for each of the known addresses of your network. The faulty node is signalled by the

Node On Line status indicator turning red.

Slow Edges

Slow Edges has the following indications.

Status Indicator State

TRAFFIC Green

Slow Edges May also be blinking red

Illegal Framing Blinking red

Poor signal Quality May also be blinking red

Pass/Fail Yellow or red

Buzzer Sounds

Status Indicator State

TRAFFIC Green

Slow edges Blinking red

Illegal Framing May also be blinking red

Poor signal Quality May also be blinking red

Pass/Fail Yellow or red

Buzzer Sounds

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Rockwell-automation 1788-CNCHKR ControlNet NetChecker User Manual Manual de usuario Pagina 16