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Serial data interface,
group 5.. (continued)
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Groups
Control words, bytes 5-8 in the telegram
The control word is used to send control
commands from a master (e.g. a PC) to
®
the VLT
frequency converter.
Byte 8
S
N
E
O
L
E
F
C
U
T
C
T
S
T
E
I
T
O
0
-
N
U
ASCII
/
P
/
1
2
R
E
V
E
R
S
I
N
G
15
14
@
0
0
A
0
0
B
0
0
C
0
0
D
0
1
E
0
1
F
0
1
G
0
1
H
1
0
I
1
0
J
1
0
K
1
0
L
1
1
M
1
1
N
1
1
O
1
1
P
X
X
X = Dont care, if P is used in a group of 4 bits, current status is retained. Only the groups with the characters in P are
activated. Bit 10 = 0 signifies no change from current status.
Bit 00, OFF1/ON1:
Ordinary ramp stop which uses the ramp
time in parameter 215/216. Bit 00 = "0"
means stop, bit 00 = "1" means that the
frequency converter can start if the other
start conditions are fulfilled.
Bit 01, OFF2/ON2:
Free-wheeling stop. Bit 01 = "0" means
free-wheeling stop, bit 01 = "1" means that
the frequency converter can start if the
other start conditions are fulfilled.
Bit 02, OFF3/ON3:
Quick stop, which uses the ramp time in
parameter 218. Bit 02 = "0" means quick
stop, bit 02 = "1" means that the frequency
converter can start if the other start condi-
tions are fulfilled.
®
MG.30.A7.02 - VLT
is a registered Danfoss trademark
According to the data format, 1 byte
consists of 8 data bits, but in the control
word only the 4 least significant bits of
each byte are used, so that ASCII charac-
ters from A to 0 can be used. The table
below shows the significance of the indi-
vidual bits of the control word:
Control word
Byte 7
S
N
N
D
J
J
E
O
O
A
O
O
L
T
G
G
E
F
F
A
C
U
U
2
1
T
C
C
N
T
T
O
O
O
S
T
T
T
F
F
E
I
I
F
F
T
O
O
V
-
A
/
/
N
N
U
L
P
I
O
O
/
/
D
N
N
1
C
S
/
A
L
T
O
V
C
W
A
H
L
-
D
I
U
O
D
P
W
N
13
12
11
10
09
08
0
0
0
0
0
0
0
1
0
0
0
1
1
0
0
0
1
0
1
1
0
0
1
1
0
0
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
0
1
1
0
1
1
1
0
0
1
0
0
0
0
1
1
0
0
1
1
0
1
0
1
0
1
1
1
0
1
1
0
0
1
1
0
0
0
1
1
1
0
1
1
0
1
1
1
0
1
1
1
1
1
1
X
X
X
X
X
X
Bit 03, Free-wheeling/possible:
Free-wheeling stop. Bit 03 = "0" means
stop, bit 03 = "1" means that the frequency
converter can start if the other start condi-
tions are fulfilled. Note: In parameter 503 it
is selected how bit 03 is connected (gates)
with the equivalent function on the digital
inputs.
Bit 04, Quick stop/ramp:
Quick stop, which uses the ramp time in
parameter 218. Bit 04 = "0" means quick
stop, bit 04 = "1" means that the frequency
converter can start if the other start condi-
tions are fulfilled.
Byte 6
Byte 5
N
R
H
Q
F
O
O
A
O
U
R
F
M
L
I
E
F
F
P
D
C
E
U
K
W
3
C
S
R
H
T
T
A
S
E
/
T
O
M
T
E
P
P
O
L
O
I
O
P
N
/
P
N
O
R
P
3
S
S
A
O
/
T
S
M
S
A
P
I
S.
R
R
B
E
T
L
S
E
E
T
07
06
05
04
03
02
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0
0
0
1
1
0
0
0
1
0
0
0
1
0
1
0
1
0
1
0
1
1
0
0
1
0
1
1
1
0
1
1
0
0
0
1
0
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
0
0
1
1
1
1
0
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
X
X
X
X
X
X
O
O
F
F
F
F
2
1
/
/
O
O
N
N
2
1
01
00
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
X
X
75
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