VLT® 5000/ 5000 FLUX/ 6000 HVAC/
8000 AQUA PROFIBUS
Warning and alarm
messages
■
Extended Diagnosis
By the extended diagnose function it is possible
to receive alarm and warning information from the
frequency converter. The setting of parameter 849
determines which frequency converter events should
trigger the extended diagnose function.
If parameter 849 is set to Disable [0], no extended
diagnose data is sent regardless wether they
appear in the frequency converter.
If parameter 849 is set to Alarms [1], extended
diagnose data is sent, if one or more alarms arrive
in the Alarm parameters. If parameter 849 is set to
Alarms/Warnings [2], extended diagnose data is sent
if one or more alarms/warnings arrive in the Alarm
parameters or the warning parameter.
The sequence of an extended diagnose is as follows:
If an Alarm or warning appears, the frequency
converter will indicate that to the master by sending
a high prior message via the output data telegram.
This will cause the master to ask the frequency
converter for extended diagnose information, which
will be replied by the frequency converter.
When the Alarm/warning disappears, the frequency
converter will again indicate that to the master, and
on the following request from the master, return a
standard DP diagnose frame (6 bytes).
The extended diagnose frame has the following content:
Byte
Content
Description
0 through 5
Standard DP Diagnose data
Standard DP Diagnose frame
6
Pdu length xx
Header of Extended diagnostic data
7
Status type = 0x81
Header of Extended diagnostic data
8
Slot = 0
Header of Extended diagnostic data
9
Status info = 0
Header of Extended diagnostic data
10 through 13
VLT parameter 540
VLT warning word
14 through 17
VLT parameter 541
VLT Status word
18 through 21
VLT parameter 538
VLT Alarm word
22 through 23
VLT parameter 953
Communication warning word
MG.90.G1.02 - VLT is a registered Danfoss trademark
47
Содержание VLT 5000 Series
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