Danfoss VLT 5000 Series, Руководство по эксплуатации

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VLT® 5000/ 5000 FLUX/ 6000 HVAC/
8000 AQUA PROFIBUS
Warning and alarm
messages
■
Warnings and alarm messages
There is a clear distinction between alarm messages
and warnings. In the event of a fault (alarm), the
frequency converter issues an error condition and
responds in the manner predetermined in the
Control word. As soon as the cause of the fault
has been repaired, the master must confirm the
fault message for the frequency converter in order
to start again. A warning is issued as soon as a
warning condition occurs. This ceases as soon as the
normal operating conditions have been re-established
without the operation being disrupted.
Warning
Every warning within the frequency converter is
represented by a single bit in a warning word. A
warning word is always an active parameter. The
bit status FALSE [0] means no warning, the bit
status TRUE [1] means warning.
Every change of a bit in the warning word generates
a spontaneous message.
Apart from the notification by the warning word,
the master is also being informed by a change
in bit 7 of the Status word.
Fault messages
After a fault message (alarm), the frequency converter
issues an error condition (bit 3 in the Status word).
The frequency converter can resume operations only
after the fault has been repaired and the master has
confirmed the fault message by a change of bit 7 in
the Control word (positive slope from "0" to "1").
Every fault within the frequency converter is represented
by a single bit in an alarm word. The alarm word is
always an active parameter. The bit status FALSE [0]
means no alarm, the bit status TRUE [1] means alarm.
Every change of a bit in the alarm word generates
a spontaneous message.
■
Spontaneous messages
If a fault or warning condition occurs, the frequency
converter issues a spontaneous message provided
that the spontaneous message in parameter 917 has
been activated. Instead of responding to the request
from the master, the frequency converter replaces the
requested response by the fault or warning message.
NB!:
Explanations regarding the individual bits of
the warning words and of the alarm word
can be found in the Operation lnstructions
of the VLT 5000 (MG.51.AX.YY), VLT 5000 FLUX
(MG.55.AX.YY), 6000 HVAC (MG.60.AX.YY) and
8000 AQUA (MG.80.AX.YY).
■
Additional display readings
If a frequency converter is equipped with a PROFIBUS
interface, it can display the following readings in addition
to the messages described in the VLT 5000/5000
Flux/6000 HVAC/8000 AQUA product manual:
Warnings:
WARN. 34
PROFIBUS COMM. FAULT
- There is no connection to the master. The reason
could be that the master has stopped (or is in an
error status), or that the PROFIBUS connection to
the frequency converter is interrupted.
- There is an SPM overflow in the FIFO buffer
for spontaneous messages. (see "Example of
a spontaneous message ").
NB!:
When parameters 927 and 928 are deactivated,
the "Warning 34" in the display of the frequency
converter will also be suppressed.
Alarm conditions
ALARM
PROFIBUS OPT. FAULT
- The option card has been destroyed by electrical
interference, or the option card is defective
and needs to be replaced.
MG.90.G1.02 - VLT is a registered Danfoss trademark
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