Danfoss Modbus RTU User Manual

17
VLT is a registered Danfoss trade mark MG.10.P2.22
Memory
Mapping
Parameter Values
StandarStandar
StandarStandar
Standar
d Data Td Data T
d Data Td Data T
d Data T
ypesypes
ypesypes
ypes
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
Registers.” Parameters are written using
function 6
HEX
“Preset Single Register” for 1
register (16 bits), and function 10
HEX
“Preset
Multiple Registers” for 2 registers (32 bits).
Valid sizes to read are 1 register (16 bits) and
2 registers (32 bits).
NonstandarNonstandar
NonstandarNonstandar
Nonstandar
d Data Td Data T
d Data Td Data T
d Data T
ypesypes
ypesypes
ypes
Nonstandard 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.”
Valid sizes to read are 1 register (2 characters)
through 10 registers (20 characters). See Text
Blocks section in this manual for truncation/
space fill rules. IND (Modbus Register 1) must
be written with a value of 0400
HEX
(read) or
0500
HEX
(write) prior to reading or writing a text
string.
Bit Setting 0 1
00 0 Preset Ref. LSB
01 0 Preset Ref. MSB
02 1 DC Brake no DC Brake
03 0 Coast Sto no Coast Stop
04 1 "Quick" Stop no "Quick" Sto
05 1 Freeze Freq. no Freeze Freq.
06 0 Ramp Stop Start
07 0 no Reset Reset
08 0 no Jo Jog
09 0 no function
10 1 Data Not Valid Data Valid
11 0 Relay 1 OFF Relay 1 ON
12 0 Relay 2 OFF Relay 2 ON
13 0 Setup LSB
14 0 Setup MSB
15 0 no Reversing Reversing
Control Word Bit Descriptions
FC Protocol
Control
Word Bit
Descriptions
Conversion
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.
Example:Example:
Example:Example:
Example:
Parameter 201: Minimum Frequency,
conversion factor 0.1. If parameter 201 is to
be set to 10 Hz, a value of 100 must be
transferred, since a conversion factor of 0.1
means that the transferred value will be
multiplied by 0.1. A value of 100 will, therefore,
be understood as 10.0.
Index Index
Index Index
Index
Factor Factor
Factor Factor
Factor
74 3.6
2 100.0
1 10.0
0 1.0
-1 0.1
-2 0.01
-3 0.001
-4 0.0001
Conversion
Factor

Danfoss Modbus RTU Specifications

General

Brand	Danfoss
Model	Modbus RTU
Category	Computer Hardware
Language	English