Data Types Supported; Conversion; Process Words (Pcd); Examples - Danfoss VLT AQUA Drive FC 202 Design Manual

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Illustration 7.11 PWE

7.4.11 Data Types Supported

Unsigned means that there is no operational sign in the
telegram.
Data types
3
4
5
6
7 7
7
9
10
13
33
35
Table 7.6 Data Types Supported

7.4.12 Conversion

The various attributes of each parameter are displayed in
the section factory settings. Parameter values are
transferred as whole numbers only. Conversion factors are
therefore used to transfer decimals.
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.

Examples:

0 s⇒conversion index 0
0.00 s⇒conversion index -2
0 ms⇒conversion index -3
0.00 ms⇒conversion index -5
170
®
VLT AQUA Drive FC 202 Design Guide
PKE IND PWE PWE
high low
Fx xx 04 00
Fx xx 05 00
Description
Integer 16
Integer 32
Unsigned 8
Unsigned 16
Unsigned 32
Text string
Byte string
Time difference
Reserved
Bit sequence
MG20Z102 - VLT
Conversion index
100
75
74
67
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
Table 7.7 Conversion Table

7.4.13 Process Words (PCD)

The block of process words is divided into two blocks of
16 bits, which always occur in the defined sequence.
PCD 1
Control Telegram (master⇒slave Control
word)
Control Telegram (slave⇒master) Status word
Table 7.8 PCD
7.5 Examples

7.5.1 Writing a Parameter Value

Change 4-14 Motor Speed High Limit [Hz] to 100 Hz.
Write the data in EEPROM.
PKE=E19E Hex - Write single word in 4-14 Motor Speed High
Limit [Hz]
IND=0000 Hex
PWE =0000 Hex
high
PWE =03E8 Hex - Data value 1,000, corresponding to 100
low
Hz, see 7.4.12 Conversion.
E19E H 0000
PKE IND
Illustration 7.12 Telegram
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is a registered Danfoss trademark
Conversion factor
1000000
100000
10000
1000
100
10
1
0.1
0.01
0.001
0.0001
0.00001
0.000001
0.0000001
PCD 2
Reference-value
Present output
frequency
H 0000 H 03E8 H
PWE PWE
high low