MG.20.B6.02 – VLT is a registered Danfoss trademark
57
VLT
®
2000 Series
Section 1 Section 2 Section 3
VLT control commands
The four control and status bytes are used to send
control commands to the frequency converter when
the telegram is sent from the master, and to send sta-
tus from the frequency converter to the master when
the telegram is returned from the VLT frequency con-
verter.
When these four bytes are used for control, they have
the following meaning:
OFF 1: Makes a normal ramp stop of the motor and
opens the relay output of the frequency
converter (relay off).
OFF 2: Makes a motor coast and opens the relay
output (relay off).
OFF 3: Same as OFF 1, but the motor makes a
quick-stop.
Bit 10: This bit has to be 1, if any of the control
commands should cause a reaction.
Control word
Byte 8 Byte 7 Byte 6 Byte 5
NSNSSDNJNRHQMOOO
OEOPPAOOOAOUOFFF
T EET G ML I TFFF
FUFEEAF FPDCO
UPUDD U1U KR3 2 1
NN NNNS/
CSCSSOCOCT SC///
TETEETTFTOETO
I L I L L OFOPNOAOOO
OEOEEVN N APSNNN
NCNCCA / / B T
T TTL / L / I 321
/IOSEN
1MLDNRTRG
RSS EARA
E/ BB/ SRAM/
VETMP
E2 V T P E
RA ON
SL NA
II B
ND L
G E
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
1/2 byte 1/2 byte 1/2 byte 1/2 byte
0000000000000000
0001000100010001
0010001000100010
0011001100110011
0100010001000100
0101010101010101
0110011001100110
0111011101110111
1000100010001000
1001100110011001
1010101010101010
1011101110111011
1100110011001100
1101110111011101
1110111011101110
1111111111111111
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
ASCII
@
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
-
0
/
1
Note: Each byte consists of 8 bits, but the frequency converter uses only the last 4 bits.
The control possibilities of the VLT
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