Fc Drive Control Profile; Control Word According To Fc Profile - Danfoss VLT Micro Drive FC 51 Design Manual

RS485 Installation and Set-...

8.11 FC Drive Control Profile

8.11.1 Control Word According to FC Profile

Set parameter 8-30 Protocol to [0] FC.
Modbus Holding Register numbers for Input data – CTW
and REF – and Output data – STW and MAV – are defined
in Table 8.34:
50000 input data
50010 input data
50200 output data Frequency converter status word register
50210 output data Frequency converter main value register
Table 8.34 Modbus Holding Register Numbers for Input and
Output Data
8 8
®
In VLT Micro Drive FC 51 after software version 2.32, the
input/output data is also available in a lower holding
register area:
02810 input data
02811 input data
02910 output data Frequency converter status word register
02911 output data Frequency converter main value register
Table 8.35 Lower Register Numbers for Input and Output Data
Master-follower
Bit
no.: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Illustration 8.14 Control Word
80
Frequency converter control word register
(CTW)
Bus reference register (REF)
(STW)
(MAV)
Frequency converter control word register
(CTW)
Bus reference register (REF)
(STW)
(MAV)
CTW Speed ref.
Danfoss A/S © 01/2016 All rights reserved.
®
VLT Micro Drive FC 51
Bit
00
01
02
03
04
05
06
07
08
09
10
11
12
13
15
Table 8.36 Definition of Control Bits
Explanation of the control bits
Bits 00/01
Bits 00 and 01 are used to select between the 4 reference
values, which are pre-programmed in parameter 3-10 Preset
Reference according to the Table 8.37.
Programmed
reference
value
1
2
3
4
Table 8.37 Control Bits
NOTICE
Make a selection in parameter 8-56 Preset Reference Select
to define how bit 00/01 gates with the corresponding
function on the digital inputs.
Bit 02, DC brake
Bit 02=0 leads to DC brake and stop. Set braking current
and duration in parameter 2-01 DC Brake Current and
parameter 2-02 DC Braking Time.
Bit 02=1 leads to ramping.
Bit 03, Coasting
Bit 03=0: The frequency converter immediately releases the
motor, (the output transistors are shut off) and the motor
coasts to a standstill.
Bit 03=1: The frequency converter starts the motor if the
other starting conditions are met.
Make a selection in parameter 8-50 Coasting Select to
define how bit 03 gates with the corresponding function
on a digital input.
Bit value=0 Bit value=1
Reference value External selection lsb
Reference value External selection msb
DC brake Ramp
Coasting No coasting
Quick stop Ramp
Hold output Use ramp
frequency
Ramp stop Start
No function Reset
No function Jog
Ramp 1 Ramp 2
Data invalid Data valid
Relay 01 open Relay 01 active
Relay 02 open Relay 02 active
Parameter set-up Selection lsb
No function Reverse
Parameter
Parameter 3-10 Preset Reference [0] 0
Parameter 3-10 Preset Reference [1] 0
Parameter 3-10 Preset Reference [2] 1
Parameter 3-10 Preset Reference [3] 1
Bit Bit
01 00
0
1
0
1
MG02K402