Rockwell-automation 842E EtherNet/IP Absolute Encoder User Manual Manuel d'utilisateur télécharger pdf (Page 53)

Rockwell Automation Publication 842E-UM001A-EN-P May 2012 45

Diagnostics and troubleshooting Chapter 7

Ethernet Link LEDs Link 1 and 2

The ethernet link LEDs, Link 1 and Link 2, display the status of the physical

connection on the ethernet interface.

Self-test via EtherNet/IP

Electromagnetic interference (EMI) can cause incorrect operations or errors in

the position value. Without a self-test an immediate position change may occur

on power up.

Using the position sensor object a self-test can be triggered with attribute 13. See

“CIP object model” on page 12. During this test the sensor and the most

important functions are tested automatically. If an error occurs, bit 27 in the fault

header is set.

Warnings, alarms and errors

via EtherNet/IP

Within EtherNet/IP warnings, alarms, and errors can be retrieved using implicit

messages and also explicit messages.

Alarms and warnings for the encoder can be read via the position sensor object

with the aid of the attributes.

For errors, alarms, and warning the following applies:

Bit status = 0: no error, alarm or warning

Bit status =1: error, alarm or warning present

In addition the Net LED illuminates red continuously.

Link 1 or Link 2 LED Description

OFF No link / power off

Green solid Ethernet connection established

Green flashing Data transmission TxD/RxD

Amber solid Interface port locked

Amber flashing Data collisions

ATTENTION

It is imperative to evaluate the alarms in your application!

In case of a serious error, incorrect position values may be output. This change

could cause an unexpected movement that may result in a hazard for persons or

damage to the system or other objects.

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Rockwell-automation 842E EtherNet/IP Absolute Encoder User Manual Manuel d'utilisateur Page 53