Danfoss VLT Flow Drive FC 111 Design Guide

When a follower responds to a parameter request (read command), the present parameter value in the PWE block is transferred and
returned to the master. If a parameter contains several data options, for example parameter 0-01 Language, select the data value by
entering the value in the PWE block. Serial communication is only capable of reading parameters containing data type 9 (text
string).
Parameter 15-40 FC Type to parameter 15-53 Power Card Serial Number contain data type 9. For example, read the unit size and mains
voltage range in parameter 15-40 FC Type. When a text string is transferred (read), the length of the telegram is variable, and the
texts are of different lengths. The telegram length is defined in the 2
nd
byte of the telegram (LGE). When using text transfer, the
index character indicates whether it is a read or a write command.
To read a text via the PWE block, set the parameter command (AK) to F hex. The index character high-byte must be 4.
8.4.11 Data Types Supported by the Drive
Table 56: Data Types
Data types
Description
3
Integer 16
4
Integer 32
5
Unsigned 8
(1)
6
Unsigned 16
(1)
7
Unsigned 32
(1)
9
Text string
10
Byte string
13
Time difference
33
Reserved
35
Bit sequence
1
Unsigned means that there is no operational sign in the telegram.
8.4.12 Conversion
The Programming Guide contains the descriptions of attributes of each parameter. Parameter values are transferred as whole num-
bers only. Conversion factors are used to transfer decimals.
Parameter 4-12 Motor Speed Low Limit [Hz] has a conversion factor of 0.1. To preset the minimum frequency to 10 Hz, transfer the
value 100. A conversion factor of 0.1 means that the value transferred is multiplied by 0.1. The value 100 is thus perceived as 10.0.
Table 57: Conversion
Conversion index
Conversion factor
74
3600
2
100
1
10
0
1
-1
0.1
-2
0.01
-3
0.001
-4
0.0001
AJ363928382091en-000101 / 130R0983 | 109Danfoss A/S © 2021.04
RS485 Installation and Set-up
VLT® Flow Drive FC 111
Design Guide

Danfoss VLT Flow Drive FC 111 Specifications

General

Brand	Danfoss
Model	VLT Flow Drive FC 111
Category	DC Drives
Language	English