Danfoss VT2800 Series, Design Manual

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VLT
®
2800 Series
Programming
Bit 05, ON 3/OFF 3:
Bit 05 = ’ 0 ’ means that Bit 02 in the control word = ’ 1 ’ .
Bit 05 = ’ 1 ’ means that Bit 02 in the control word = ’ 0 ’ .
Bit 06, Start enable/start disable:
Bit 06 = ’ 1 ’ after reset of a trip, after activation of OFF2
or OFF3 and after connection of mains voltage. Start
disable is reset by setting Bit 00 in the control word
to ’ 0 ’ , and Bit 01, 02 and 10 are set to ’ 1 ’ .
Bit 07, Warning:
See description under Status word according
to FC protocol.
Bit 08, Speed:
See description under Status word according
to FC protocol.
Bit 09, No warning/warning:
See description under Status word according
to FC protocol.
Bit 10, Speed
≠
ref/speed = ref.:
See description under Status word according
to FC protocol.
Bit 11, Running/not running:
See description under Status word according
to FC protocol.
Bit 13, Voltage warning high/low:
See description under Status word according
to FC protocol.
Bit 14, Current limit:
See description under Status word according
to FC protocol.
Bit 15, Thermal warning:
See description under Status word according
to FC protocol.
■
Serial communication reference
The serial communication reference is transferred to
the frequency converter as a 16-bit word. The value is
transferred in whole numbers 0 - ±32767 (±200%).
16384 (4000 Hex) corresponds to 100%.
The serial communication reference has the following
format: 0-16384 (4000 Hex) 0-100% (Par. 204
Minimum ref. - Par. 205 Maximum ref. ).
It is possible to change the direction of rotation via the
serial reference. This is done by converting the binary
reference value to 2 ’ complement. See example.
Example - Control word and serial communication ref.:
The frequency converter is to receive a start
command and the reference is to be set to 50%
(2000 Hex) of the reference range.
Control word = 047F Hex
⇒
Start command.
Reference = 2000 Hex
⇒
50% reference.
The frequency converter is to receive a start
command and the reference is to be set to -50%
(-2000 Hex) of the reference range.
The reference value is first converted to 1 ’ complement,
and then 1 is added binarily to obtain 2 ’ complement:
2000 Hex 0010 0000 0000 0000 0000
1 ’ complement 1101 1111 1111 1111 1111
+ 1
2
’
complement 1110 0000 0000 0000 0000
Control word = 047F Hex
⇒
Start command.
Reference = E000 Hex
⇒
-50% reference.
■
Present output frequency
The value of the frequency converter ’ s present output
frequency is transferred as a 16-bit word. The value is
transferred as whole numbers 0 - ±32767 (±200%).
16384 (4000 Hex) corresponds to 100%.
MG.28.E9.02 - VLT is a registered Danfoss trademark
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