11.11.5 Conversion Factor
The different attributes for each parameter can be seen in
the section on factory settings. Since a parameter value
can only be transferred as a whole number, a conversion
factor must be used to transfer decimals. Please refer to
the Parameters section.
11.11.6 Parameter Values
Standard Data Types
Standard data types are int16, int32, uint8, uint16 and
uint32. They are stored as 4x registers (40001 – 4FFFF). The
parameters are read using function 03HEX "Read Holding
Registers." Parameters are written using the function 6HEX
"Preset Single Register" for 1 register (16 bits), and the
function 10HEX "Preset Multiple Registers" for 2 registers
(32 bits). Readable sizes range from 1 register (16 bits) up
to 10 registers (20 characters).
Non standard Data Types
Non standard data types are text strings and are stored as
4x registers (40001 – 4FFFF). The parameters are read
using function 03HEX "Read Holding Registers" and written
using function 10HEX "Preset Multiple Registers." Readable
sizes range from 1 register (2 characters) up to 10 registers
(20 characters).
11.12
Danfoss FC Control Profile
11.12.1 Control Word According to FC
Profile (8-10 Control Profile = FC
profile)
Speed ref.CTW
Master-slave
130BA274.10
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit
no.:
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
Explanation of the 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 the following table:
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
NOTE
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.
RS-485 Installation and Set... FC 300 Design Guide
MG.33.BD.02 - VLT
®
is a registered Danfoss trademark 267
11
11
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