Danfoss FCM 300 Series, Operating Instructions Manual

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FCM 300 / FCD 300 / VLT
®
2800 / DP V1 PROFIBUS
Profibus
DP
The PCV part is a "hand shake" procedure which means
that the frequency converter has to acknowledge the
command, before a new one can be written.
- A positive response of the above example
may look like this:
Byte Value
PCA 1 20
PCA 2 CF
IND 3 00
IND 4 00
PVA 5 00
PVA 6 00
PVA 7 03
PCV
PVA 8 E8
STW 9 0F
STW 10 07
MAV 11 20
PCD
MAV 12 00
The PCD part responds according to the state and
parametration of the frequency converter.
The PCV part responds as: PCA: As the request
telegram, but here the RC part is taken from the
response table see section
PCA handling
. In
this example RC is 2Hex, which is a confirmation
that a parameter value of the type long word
(32 bit) has been transferred.
IND is not used in this example.
PVA: 03E8Hex in the PVA part tells that the
value of the parameter in question (207) is 1000
which corresponds to 10.00.
STW: 0F07 Hex means that the motor is running
and there are no warnings or faults (for details see
Status word table in section
Status word
).
MAV: 2000 Hex tells that the output frequency
is 50% of max. frequency.
- A negative response may look like this:
Byte Value
PCA 1 70
PCA 2 00
IND 3 00
IND 4 00
PVA 5 00
PVA 6 00
PVA 7 00
PCV
PVA 8 02
STW 9 0F
STW 10 07
MAV 11 20
PCD
MAV 12 00
RC is 7 Hex which means that the request has been
rejected, and the fault number can be found in the PVA
part. In this case the fault number is 2 which means that
the upper or lower limit of the parameter is exceeded.
See fault number table in section
PCA handling
.
MG.90.A5.02 - VLT is a registered Danfoss trademark
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