No Communication With The Frequency Converter - Danfoss VLT DeviceNet MCA 104 Installation Manual

Troubleshooting
State Bi-colour LED
No Off
Power/Not
on-line
On-line, not Green
connected
On-line and Green
connected
Connection Red
time-out
Critical link Red
failure
Table 4.2 LED: Network Status (NS)
4.2.2 No Communication with the
Frequency Converter
When there is no communication with the frequency
converter, proceed with the following checks:
1. Check that cabling is correct.
Check that the cables are connected to the
correct terminals as shown in Illustration 3.8.
2. Check that the bus connection is terminated at
both ends.
If not, terminate the bus connection with
termination resistors at the initial and final nodes.
MG33D502
Installation Guide
Danfoss A/S © Rev. 03/2015 All rights reserved.
Status
The option has not completed "Duplicate
MAC ID" test yet or may not be powered.
The option is on-line, but not allocated
to a master.
The DeviceNet option is on-line and
connected to a master.
One or more I/O connections are in time-
out state.
4 4
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