Ind; Text Blocks; Conversion Factor; Parameter Values - Danfoss VLT AutomationDrive FC 300 Design Manual

RS-485 Installation and Set...

10.12.3 IND

The array index is set in holding register 9 and used when
accessing array parameters.

10.12.4 Text Blocks

Parameters stored as text strings are accessed in the same
way as the other parameters. The maximum text block size
is 20 characters. If a read request for a parameter exceeds
20 characters, the response is truncated. If the read request
for a parameter is for fewer characters than the parameter
stores, the response is space filled.

10.12.5 Conversion Factor

Since a parameter value can only be transferred as a whole
number, a conversion factor must be used to transfer
decimals. See 10.8 Examples.

10.12.6 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 03 HEX "Read Holding
10 10
Registers." Parameters are written using the function 6 HEX
"Preset Single Register" for 1 register (16-bits), and the
function 10 HEX "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 03 HEX "Read Holding Registers" and written
using function 10 HEX "Preset Multiple Registers." Readable
sizes range from 1 register (2 characters) up to 10 registers
(20 characters).

10.13 FC Control Profile

10.13.1 Control Word According to
FC Profile
Master-slave
Bit
no.:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Illustration 10.15 CW Master to Follower
252
CTW Speed ref.
®
VLT AutomationDrive FC 300 Design Guide 90-1200 kW
Bit
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
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 10.21.
Programmed
reference value
1
2
3
4
Table 10.19 Control Bits
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.
MG34S202 - Rev. 2013-08-19
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 frequency use ramp
Ramp stop Start
No function Reset
No function Jog
Ramp 1 Ramp 2
Data invalid Data valid
No function Relay 01 active
No function Relay 02 active
Parameter set-up selection lsb
Parameter set-up selection msb
No function Reverse
Parameter Bit 01
[0] 3-10 Preset 0
Reference
[1] 3-10 Preset 0
Reference
[2] 3-10 Preset 1
Reference
[3] 3-10 Preset 1
Reference
Bit 00
0
1
0
1