Danfoss Fc Control Profile - Danfoss MCA 122 Modbus TCP Operating Instructions Manual

How to Control

4.4 Danfoss FC Control Profile

→
Illustration 4.2 8-10 Control Word Profile=Frequency Converter
profile
Bit Bit value=0
00 Reference value
01 Reference value
02 DC brake
03 Coasting
04 Quick stop
05 Hold output frequency
06 Ramp stop
07 No function
08 No function
09 Ramp 1
10 Data invalid
11 No function
12 No function
13 Parameter set-up
14 Parameter set-up
15 No function
Table 4.7 Control Word Bits
Explanation of control bits
Bits 00/01
Bits 00 and 01 are used to choose between the four
reference values, which are pre-programmed in 3-10 Preset
Reference according to Table 4.8.
Programmed Parameter
ref. value
1 3-10 [0]
2 3-10 [1]
3 3-10 [2]
4 3-10 [3]
Table 4.8 Reference Values
NOTICE
In 8-56 Preset Reference Select select a selection is made to
define how Bit 00/01 gates with the corresponding
function on the digital inputs.
MCA 122 Modbus TCP
Bit value=1
External selection LSB
External selection MSB
Ramp
No coasting
Ramp
Use ramp
Start
Reset
Jog
Ramp 2
Data valid
Relay 01 active
Relay 04 active
Selection LSB
Selection MSB
Reverse
Bit 01 Bit 00
0 0
0 1
1 0
1 1
®
MG90P202 - VLT is a protected Danfoss trademark
Bit 02, DC brake
Bit 02='0' leads to DC braking and stop. Braking current
and duration are set in 2-01 DC Brake Current and 2-02 DC
Braking Time. Bit 02='1' leads to ramping, 3-41 Ramp 1
Ramp Up Time
Bit 03, Coasting
Bit 03='0' causes the frequency converter to immediately
release the motor (the output transistors are "shut off"), so
that it coasts to a standstill.
Bit 03='1' enables the frequency converter to start the
motor if the other starting conditions have been fulfilled.
NOTICE
In 8-50 Coasting Select 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 speed is
ramped down to stop via 3-81 Quick Stop Ramp Time.
Bit 05, Hold output frequency
Bit 05='0' causes the present output frequency (in Hz) to
freeze. The frozen output frequency can then be changed
only with the digital inputs (5-10 Terminal 18 Digital Input
to 5-15 Terminal 33 Digital Input) programmed to Speed up
and Speed down.
NOTICE
If Freeze output is active, the frequency converter can only
be stopped by the following:
•
Bit 03 Coasting stop
•
Bit 02 DC braking
•
Digital input (5-10 Terminal 18 Digital Input to
5-15 Terminal 33 Digital Input) programmed to DC
braking, Coasting stop or Reset and coasting stop
Bit 06, Ramp stop/start
Bit 06='0' causes a stop, in which the motor speed is
ramped down to stop via the selected ramp down
parameter.
Bit 06='1' permits the frequency converter to start the
motor, if the other starting conditions have been fulfilled.
NOTICE
In 8-53 Start Select Start select a selection is made to define
how Bit 06 Ramp stop/start gates with the corresponding
function on a digital input.
Bit 07, Reset
Bit 07='0' no reset.
Bit 07='1' resets a trip. Reset is activated on the leading
edge of the signal, that is, when changing from logic '0' to
logic '1'.
Bit 08, Jog
Bit 08='1' causes the output frequency to be determined
by 3-19 Jog Speed [RPM].
4 4
23