Specifications

Response
The normal response returns the slave address, function
code, starting address, and quantity of registers preset.
Field Name Example (HEX)
Slave Address 01
Function 10
Starting Address HI 04
Starting Address LO D7
No. of Registers HI 00
No. of registers LO 02
Error Check (CRC) -
Table 8.32 Response
8.11 Danfoss FC Control Profile
8.11.1 Control Word According to FC
Profile (8-10 Control Profile = FC
profile)
Speed ref.CTW
Master-follower
130BA274.11
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit
no.:
Illustration 8.16 Control Word
Bit Bit value = 0 Bit value = 1
00 Reference value External selection lsb
01 Reference value External selection msb
02 DC brake Ramp
03 Coasting No coasting
04 Quick stop Ramp
05 Hold output frequency Use ramp
06 Ramp stop Start
07 No function Reset
08 No function Jog
09 Ramp 1 Ramp 2
10 Data invalid Data valid
11 No function Relay 01 active
12 No function Relay 02 active
13 Parameter set-up Selection lsb
14 Parameter set-up Selection msb
15 No function Reverse
Table 8.33 Control Word 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 3-10 Preset Reference
according to Table 8.34.
Programmed ref.
value
Parameter Bit 01 Bit 00
1
3-10 Preset
Reference [0]
0 0
2
3-10 Preset
Reference [1]
0 1
3
3-10 Preset
Reference [2]
1 0
4
3-10 Preset
Reference [3]
1 1
Table 8.34 Reference Values
NOTICE
Make a selection in 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 braking and stop. Set braking
current and duration in 2-01 DC Brake Current and 2-02 DC
Braking Time. Bit 02 = ’1’ leads to ramping.
Bit 03, Coasting
Bit 03 = ’0’: The frequency converter immediately "lets go"
of the motor, (the output transistors are "shut off") and it
coasts to a standstill. Bit 03 = ’1’: The frequency converter
starts the motor, if the other starting conditions are met.
Make a selection in 8-50 Coasting Select to define how Bit
03 gates with the corresponding function on a digital
input.
Bit 04, Quick stop
Bit 04 = ’0’: Makes the motor speed ramp down to stop
(set in 3-81 Quick Stop Ramp Time).
Bit 05, Hold output frequency
Bit 05 = ’0’: The present output frequency (in Hz) freezes.
Change the frozen output frequency only with the digital
inputs (5-10 Terminal 18 Digital Input to 5-15 Terminal 33
Digital Input) programmed to Speed up and Slow 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 and makes the motor speed
ramp 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 are met.
Installation and Set-up
Design Guide
144 Danfoss A/S © Rev. 06/2014 All rights reserved. MG11BC02
88