Danfoss VLT DeviceNet MCA 104, Руководство по программированию

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State Bicolor LED Status
No
Power/Not
on-line Off – The option has not completed “Duplicate
MAC ID” test yet or may not be powered.
On-line, not
connected Green The option is on-line, but not allocated
to a master.
On-line and
connected Green The DeviceNet option is on-line and
connected to a master.
Connection
timeout Red One or more I/O connections are in
timeout state.
Critical link
failure Red –
Table 8.2 LED: Network Status (NS)
8.2 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 8.2 .
Pin number Terminal Color Name
1 V- Black GND
2 CAN_L Blue CAN LOW
3 Drain (bare) Screen
4 CAN_H White CAN HIGH
5 V+ Red +24 V
Illustration 8.2 Correct Cabling
2. The 24 V network voltage is applied.
3. The correct EDS file is installed. Download the
correct EDS file from
www.danfoss.com/drives .
4. 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.
Refer to
Illustration 8.3 . Termination is performed
between terminal 2 (CAN_L) and 4 (CAN_H) with
a resistor: 121
Ω
, 1% metal film, ¼ W.
24 V
Trunk line
Power supply
Drop lines 1
RT=Termination resistors
R
T
R
T
195NA228.10
1 1 1
1
Illustration 8.3 Topology
8.3 Frequency Converter Does Not Respond
to Control Signals
For Danfoss control word profile (instances 100/150 and
101/151), check that:
1. The control word is valid.
When bit 10=0 in the control word, the frequency
converter does not accept the control word,
because the default setting is bit 10=1.
Set bit 10=1 via the PLC.
2. The relationship between bits in the control word
and the terminal I/O is correct.
Check the logical relationship in the frequency
converter.
Set the logic to bit 3=1 and digital input=1 to
achieve a successful start.
Define the logical relationship in parameter 8-50 Coasting
Select to parameter 8-56 Preset Reference Select according to
the following range of options. Select the FC control mode,
digital input and/or bus communication, using
Troubleshooting Programming Guide
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