Rockwell-automation 1734-485ASC POINT I/O ASCII User Manual Manual de usuario descargar pdf (Pagina 56)

Publication 1734-UM009B-EN-P - July 2003

3-2 Diagnostics

Table 3.2 Network Status Indicators

Indication Probable Cause

Network Status

Off Device is not on-line.

- Device has not completed dup_MAC_id test.

- Device not powered - check module status indicator.

Flashing Green Device is on-line but is not allocated to a master.

Green Device on-line and has connections in the established

state.

Flashing Red One or more I/O connections in timed-out state.

Red Critical link failure - failed communication device. Device

detected error that prevents it communicating on the

network.

Table 3.3 Transmit/Receive Indicators

Indication Probable Cause

Transmit/Receive Status

Flashing Transmit/

Off Receive

Check wiring, ground, and RX connection. User parameter

object to view transaction IDs.

Flashing Receive/

Off Transmit

Check wiring. Watch TX light. If it does not flash, check

that you are properly initiating transmission. Use EDS

parameter object to try transmitting and watch the light.

If it flashes, you are not properly initiating transmission

via I/O messaging. If it does flash, check the remote

device.

Off Transmit/

Green Receive

Check connections as you may have wired the device

backwards.

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Rockwell-automation 1734-485ASC POINT I/O ASCII User Manual Manual de usuario Pagina 56