Danfoss VLT AutomationDrive FC 360, Руководство по конструкции

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Conversion index Conversion factor
74 3600
2 100
1 10
0 1
-1 0.1
-2 0.01
-3 0.001
-4 0.0001
-5 0.00001
Table 5.9 Conversion
5.4.13 Process Words (PCD)
The block of process words is divided into 2 blocks of 16
bits, which always occur in the defined sequence.
PCD 1 PCD 2
Control telegram (master
⇒
follower control
word)
Reference-value
Control telegram (follower
⇒
master) status
word
Present output
frequency
Table 5.10 Process Words (PCD)
5.5 Examples
5.5.1 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.
•
PWEHIGH=0000 hex.
•
PWELOW=03E8 hex.
Data value 1000, corresponding to 100 Hz, see
chapter 5.4.12 Conversion .
The telegram looks like Illustration 5.9 .
E19E H
PKE IND PWE
high
PWE
low
0000 H 0000 H 03E8 H
130BA092.10
Illustration 5.9 Telegram
NOTICE
4-14 Motor Speed High Limit [Hz] is a single word, and the
parameter command for write in EEPROM is E .
4-14 Motor Speed High Limit [Hz] is 19E in hexadecimal.
The response from the slave to the master is shown in
Illustration 5.10 .
119E H
PKE
IND PWE
high
PWE
low
0000 H 0000 H 03E8 H
130BA093.10
Illustration 5.10 Response from Master
5.5.2 Reading a Parameter Value
Read the value in 3-41 Ramp 1 Ramp Up Time
PKE=1155 hex - Read parameter value in 3-41 Ramp 1
Ramp Up Time :
•
IND=0000 hex.
•
PWE
HIGH
=0000 hex.
•
PWE
LOW
=0000 hex.
1155 H
PKE IND PWE
high
PWE
low
0000 H 0000 H 0000 H
130BA094.10
Illustration 5.11 Telegram
If the value in 3-41 Ramp 1 Ramp Up Time is 10 s, the
response from the slave to the master is shown in
Illustration 5.12 .
130BA267.10
1155 H
PKE
IND
0000 H 0000 H 03E8 H
PWE
high
PWE
low
Illustration 5.12 Response
3E8 hex corresponds to 1000 decimal. The conversion
index for
3-41 Ramp 1 Ramp Up Time is -2, that is, 0.01.
3-41 Ramp 1 Ramp Up Time is of the type Unsigned 32 .
RS485 Installation and Set-... Design Guide
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