Control Word According To Fc Protocol - Danfoss VLT Decentral FCD 300 Operating Instructions Manual

VLT® Decentral FCD
Conversion table
Conversion
index
73
2
1
0
-1
-2
-3
-4
-5
3.7.5 Process Words
The block of process words is divided into two blocks of 16 bits, which
always occur in the defined sequence.

3.7.6 Control Word According to FC Protocol

FC protocol
To select in the control word, parameter 512
file FC protocol
must be set to [1].
The control word is used to send commands from a master (e.g. a PC) to
a slave (frequency converter).
Bit Bit = 0
00
01
02 DC braking
03 Coasting stop
04 Quick stop
05 Freeze outp. freq.
06 Ramp stop
07
08
09 Ramp 1
10 Data not valid
11 No function
12 No function
13 Select Setup, lsb
14 Select Setup, msb
15
Bit 00/01:
Bit 00/01 is used to select between the two pre-programmed references
Preset reference
(parameters 215-218
Conversion
factor
0.1
100
10
1
0.1
0.01
0.001
0.0001
0.00001
Telegram Pro-
Bit =1
Preset ref. lsb
Preset ref. msb
Start
Reset
Jog
Ramp 2
Data valid
Relay output
Digital output
Reversing
) according to the following table:
MG.04.B8.02 - VLT is a registered Danfoss trademark
PCD 1
Control telegram Control word
(master ⇒ slave)
Control telegram Status word
(slave ⇒ master)
Preset ref. Parameter
1 215
2 216
3 217
4 218
NB!
Selection of preset reference
In parameter 508
lection is made to define how Bit 00/01 gates with the
corresponding function on the digital inputs.
Bit 02, DC brake:
Bit 02 = '0' causes DC braking and stop. Brake voltage and duration are
DC brake voltage
preset in parameters 132
ing time DC brake
. Note: In parameter 504
how Bit 02 gates with the corresponding function on a digital input.
Bit 03, Coasting stop:
Bit 03 = '0' causes the frequency converter to immediately "let go" of the
motor (the output transistors are "shut off"), so that it coasts to a stand-
still.
Bit 03 = '1' causes the frequency converter to be able start the motor if
the other starting conditions have been fulfilled. Note: In parameter 502
Coasting stop
a selection is made to define how Bit 03 gates with the
corresponding function on a digital input.
Bit 04, Quick stop:
Bit 04 = '0' causes a stop, in which the motor's speed is ramped down to
Quick stop ramp-down time
stop via parameter 212
3 Programming
3
PCD 2
Reference-
value
Present outp.
frequency
Bit 01 Bit 00
0 0
0 1
1 0
1 1
a se-
DC brak-
and parameter 126
a selection is made to define
.
73