Danfoss VLT 5000 Series, Руководство по эксплуатации

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VLT® 5000/ 5000 FLUX/ 6000 HVAC/
8000 AQUA PROFIBUS
Spontaneous
messages
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Spontaneous messages
The spontaneous message is triggered by the active
alarm and warning words parameters in the actual
drive. The PCV response indicates the parameter
number (PNU) and the parameter value (PVA) of the
modified active parameter that triggered the message.
Spontaneous messages are generated when active
parameters are changed, i.e. a message occurs when
a warning appears and when a warning disappears.
At the same time, the frequency converter modifies the
SPM bit (11) of the PCV word (see "PCA processing").
The spontaneous messages are transmitted
until the master has confirmed the receipt of the
message and changed the SPM bit.
NB!:
Spontaneous messages are only activated when
the parameter 917 is in the "ON" position. In the
event of an activated spontaneous message,
the parameter channel is blocked until the spontaneous
message has been acknowledged by the master.
Example of a spontaneous message for VLT 5000
Observation of the parameter channel (PCV) from the PPO (without index field):
PCV (Hex) PVA (Hex) from Master from
frequency
converter Description
12 08 00 00 00 00 x The master requests the current of the
frequency converter
12 08 00 00 00 F0 x The frequency converter current value: 2.4
Amp (parameter 520)
12 08 00 00 00 00 x The master requests the current of the
frequency converter
AC 1A 00 00 00 0A x The frequency converter has a spontaneous
message, the spontaneous message bit is set,
the PNU 538 (alarm word) has the value 000A
(Hex)
1C 08 00 00 00 00 x The master requests the current of the
frequency converter and acknowledges the
spontaneous message by "toggling" the SPM
in the PCV
1C 08 00 00 00 F0 x The frequency converter current value: 2.4
Amp, the spontaneous message bit remains at
"1" until the next spontaneous message; the
spontaneous message is acknowledged.
The frequency converter saves up to 16 consecutively
transmitted SPMs in a FIFO buffer. If only one SPM is
in the FIFO buffer, the frequency converter immediately
resumes normal operations after the master has
acknowledged it (and the cause of the SPM has been
eliminated). If there is more than one SPM in the FIFO
buffer, the transmission takes place one after the other
following the acknowledgement. Additional SPMs that
are generated while the buffer is full will be ignored.
MG.90.G1.02 - VLT is a registered Danfoss trademark
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